Article
Materials Science, Multidisciplinary
Grace N. Ngubeni, Olusola Akinbami, Lineo Mxakaza, Siyabonga Nkabinde, Tshwarela Kolokoto, Francis Otieno, Makwena J. Moloto, Kalenga P. Mubiayi, Nosipho Moloto
Summary: This study investigated the application of Cu2ZnSnS4 (CZTS) and Cu2ZnSnSe4 (CZTSe) nanoparticles as counter electrodes in dye-sensitized solar cells (DSSCs). The results showed that CZTSe had better electrocatalytic activity on glassy carbon, while CZTS performed the best on ITO and FTO substrates.
Article
Chemistry, Physical
Aryal Krishna Prasad, In-Rok Jo, Soon-Hyung Kang, Kwang-Soon Ahn
Summary: A novel electrochemical method was used to synthesize rGO-Cu2S as a counter electrode for quantum-dot-sensitized solar cell applications. Compared to Pt and Cu2S counter electrodes, rGO-Cu2S displayed lower charge transfer resistance and higher electrocatalytic activity, leading to an improved power conversion efficiency in QDSSCs.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
G. S. Sahoo, S. Routray, K. P. Pradhan, G. P. Mishra
Summary: Quantum engineering in kesterite solar cells has proposed a quantum-dot-embedded structure using CZTS(x)Se1-(x) and CZTS with different sulfur (S) and selenium (Se) content as dot and barrier. The incorporation of quantum dots and detailed investigation on optical and electrical performance show the uniqueness of this study, highlighting the effect of carrier quantization in the material.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Energy & Fuels
Xiaobo Chen, Yefei Zhuang, Qingyu Shen, Xiaoyu Cao, Wen Yang, Peizhi Yang
Summary: Using MXene/CoS as a high electrocatalytic counter electrode in QDSSCs significantly enhances cell performance, mainly due to the synergistic effects of the unique layered morphology of conductive MXene nanosheets and cocatalysis with CoS nanoparticles, providing abundant catalytic active sites.
Article
Engineering, Electrical & Electronic
P. Chandrasekar, S. K. Palaniswamy, Soumyaranjan Routray
Summary: The study proposed quantum well-solar cells based on kesterite material, achieving high solar cell efficiency through a large number of quantum wells and performance analysis. The research focused on the quantum efficiency of solar cells with separate internal and external absorptions, emphasizing the impact of carrier quantization on material properties.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Review
Chemistry, Physical
Layla Haythoor Kharboot, Nor Akmal Fadil, Tuty Asma Abu Bakar, Abdillah Sani Mohd Najib, Norhuda Hidayah Nordin, Habibah Ghazali
Summary: Third-generation solar cells, such as dye-sensitized solar cells and quantum dot-sensitized solar cells, require counter electrodes (CEs) for their functionality. Platinum-based CEs are dominant but expensive, thus alternative materials like transition metal chalcogenides (TMCs) and transition metal dichalcogenides (TMDs) have been explored. This study provides a comprehensive review of the major components and working principles of these solar cells, and evaluates the performance efficiencies resulting from TMS-based CEs compared to Pt-based CEs.
Article
Chemistry, Physical
Bin Bin Jin, Hui Sheng Huang, Shu Ying Kong, Guo Qing Zhang, Biao Yang, Chu Xing Jiang, Ya Zhou, Dan Jun Wang, Jing Hui Zeng
Summary: In this study, ATO/PbSe composite was designed as the counter electrode for QDSSCs, showing enhanced electrocatalytic activity and stability compared to PbSe CE obtained by PVD. The improved performance is attributed to the high specific surface area, permeability, conductivity, and interface connectivity of ATO/PbSe CE, providing more active sites for reduction and fast channels for ion diffusion and electron transport. As a result, the CdS QDSSCs and CdS/CdSe co-sensitized QDSSCs assembled with ATO/PbSe CE exhibited higher power conversion efficiency than PbSe CE obtained by PVD, with stable photovoltaic properties over 200 minutes.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Lan Zhou, Hong Ling Ren, Chun Qin Yang, Ya Xue Wu, Bin Bin Jin
Summary: By using the SILAR method, ATO porous matrix film-supported CuS composites were constructed on a fluorine-doped tin oxide glass substrate, showing excellent electrocatalytic activity. Through optimizing the deposition cycles, a stable efficiency was achieved while improving the conductivity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Rabin Paul, Trupti Ranjan Lenka, Fazal Ahmed Talukdar, Nour El Islam Boukortt, Hieu Pham Trung Nguyen
Summary: The ultrathin-film solar cell technology utilizing chalcogenide materials like CIGS, CZTS, and CZTSe has shown promising performance. This study proposes a single-layer a-Si/CZTSe structure for the UTFSC, which exhibits an efficiency of 10.99% at optimized thicknesses. Introducing defects in the CZTSe layer reduces the cell's performance to 10.58%. The results suggest a potential for further development of UTFSC using nontoxic materials and a simple fabrication process.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Chemistry, Physical
Meitong Chu, Zhonglin Du, Yanying Zhang, Lin Li, Shujie Jiao, Fahad Azad, Shichen Su
Summary: In this study, a graphene/Cu2-xSe composite material was prepared and studied for its photovoltaic and electrochemical properties. By optimizing the ratio of GR:Cu2-xSe and sintering temperature, the QDSCs based on the optimized GR/Cu2-xSe composite CE showed a significant improvement in cell performance compared to other types of CEs, with a PCE of 6.66%. The enhanced performance of the composite CE was attributed to the combination of high catalytic activity of Cu2-xSe nanoparticles and good conductivity of graphene, suggesting that GR/Cu2-xSe composite CE could be a potential candidate for high efficiency QDSCs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
S. T. Yussuf, K. V. Mokwebo, K. C. Januarie, M. Oranzie, E. I. Iwuoha
Summary: Recently, kesterite (CZTS) has been considered as a promising alternative material for low-cost thin film solar cells due to its high absorption coefficient, direct band gap, natural abundance, and low toxicity. However, the efficiency of CZTS solar cells is still relatively low compared to silicon, which hinders its commercialization. Therefore, developing new materials with improved optical and photovoltaic properties is encouraged.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Energy & Fuels
Idris Ibrahim, Dong Han Seo, Alexander Angeloski, Andrew McDonagh, Ho Kyong Shon, Leonard D. Tijing
Summary: This study successfully synthesized heterostructure microflowers composed of vertically aligned CuS/Sn2S3 nanosheets using a single-step solvothermal method for solar steam generation application. Through the excellent design of microflower structures and nanocavities, high-efficiency water evaporation, salt ions rejection, and organic dye removal were achieved in various applications.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Materials Science, Multidisciplinary
Patrick Pearson, Jan Keller, Jes Larsen, Volodymyr Kosyak, Charlotte Platzer-Bjorkman
Summary: In 2017, CIGS, CZTS, and CZTSSe thin film solar cells were irradiated by 3 MeV protons to study their radiation hardness and recovery. CZTS and CZTSSe showed better resistance and recovery in terms of performance compared to CIGS. However, in a later investigation in 2021, while CZTSSe fully recovered from radiation damage, it exhibited aging-related degradation.
Article
Engineering, Electrical & Electronic
Ru Zhou, Xinnian Liu, Shiwang Zhang, Liangcheng Liu, Lei Wan, Huier Guo, Xi Yang, Zhen Cheng, Liusen Hu, Haihong Niu, Xiaoli Mao
Summary: CuSbS2 thin films as counter electrodes for QDSCs show promising performance and catalytic capability, offering a potential option for constructing highly efficient QDSCs.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Kelechi C. Nwambaekwe, Milua Masikini, Penny Mathumba, Morongwa E. Ramoroka, Samantha Duoman, Vivian Suru John-Denk, Emmanuel I. Iwuoha
Summary: Metal chalcogenides like copper zinc tin sulfide (CZTS) have shown promise as photovoltaic cell materials, but are hindered by crystal defects and low open circuit potential. Strategies such as alloying and substitution with other elements have improved the properties, leading to the synthesis of a novel kesterite nanomaterial. Analysis confirmed the nanostructured nature of CZTS and the substituted material CZTSTe, which displayed enhanced electrical conductivity and thermal stability, making them favorable for photovoltaic applications.
Article
Engineering, Environmental
Qu Yang, Xiu Gong, Xiaosi Qi, Xuncheng Liu, Cheng Liu, Quanfeng Zhou, Qiang Sun, Yan Shen, Mingkui Wang
Summary: So far, SpiroOMeTAD has been extensively used in high-performance perovskite solar cells (PSCs) as the most studied hole transport layer (HTL) material. However, its long-term stability is limited by sensitivity to moisture and ion diffusion. In this study, we introduce a highly hydrophobic tetrathiophene polymer (PAQM-DPP) as a chemically tailored modifier for SpiroOMeTAD HTL, which forms a robust bilayer structure and significantly improves stability and tolerance to moisture. Under constant illumination conditions in a N2 atmosphere, the PSCs with the polymer/SpiroOMeTAD bilayer maintained over 92% PCE for 500 hours and exhibited higher tolerance to relative humidity compared to the SpiroOMeTAD HTL counterpart.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Wanpeng Yang, Haixuan Yu, Letian Dai, Zhiguo Zhang, Anjie Gu, Huaxia Ban, Qiang Sun, Shuangyin Chen, Yan Shen, Mingkui Wang
Summary: This study proposes an effective method using phosphorus pentachloride as an additive to fabricate high-quality and stable CsPbI3 films. The method has great potential in photovoltaic applications.
Article
Chemistry, Multidisciplinary
Guanhua Ren, Zhiguo Zhang, Yanyu Deng, Zhuowei Li, Chunyu Liu, Mingkui Wang, Wenbin Guo
Summary: Surface passivation with organic iodides is crucial for high-performance perovskite solar cells (PSCs), but it often leads to stability degradation due to migration of iodine interstitial (I-i) defects. We found that untreated surface treatment can induce I-i formation and subsequent migration. Cation selection for organic iodides is important, as a strong cation-perovskite surface interaction can suppress I-i migration by increasing the migration energy barrier. Phenylpropylammonium iodide-treated PSCs achieve enhanced efficiency and stability, with a champion efficiency of 24.20% and retaining about 92% of their initial efficiency after 240 hours of continuous illumination.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Infectious Diseases
Lingshuang Ren, Li Lin, Hua Zhang, Qianli Wang, Yibing Cheng, Qin Liu, Bing Fang, Linsen Xie, Meng Wang, Juan Yang, Jinxin Guo, Tianchen Zhang, Hongkai Lian, Jiangtao Wang, Hongjie Yu
Summary: This study aimed to explore the epidemiological and clinical characteristics of pediatric patients hospitalized with RSV or influenza infection before and during the relaxation of NPIs in central China during the COVID-19 pandemic. The results showed that RSV infections increased after the relaxation of NPIs, while influenza infections decreased. Therefore, there is a need for more effective prevention strategies to prevent RSV infections in children.
INFLUENZA AND OTHER RESPIRATORY VIRUSES
(2023)
Article
Materials Science, Multidisciplinary
Liqi Li, Wenjian Shen, Chenquan Yang, Yuxi Dou, Xuehao Zhu, Yao Dong, Juan Zhao, Junyan Xiao, Fuzhi Huang, Yi-Bing Cheng, Jie Zhong
Summary: The study presents a convenient and scalable solution route, chemical bath deposition (CBD), for fabricating efficient hole transport layer, planar NiOx film, for inverted perovskite solar cells (IPSCs). The CBD process allows adjustment of the film properties by varying the cation concentration, resulting in enhanced charge transport efficiency and improved efficiency of the solar cells from 16.14% to 18.17%.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Pediatrics
Zhengzheng Zhang, Jinhao Tao, Xiaodi Cai, Li Huang, Chengjun Liu, Hong Ren, Dong Qu, Hengmiao Gao, Yibing Cheng, Furong Zhang, Zihao Yang, Wei Xu, Hongjun Miao, Pan Liu, Yuxin Liu, Guoping Lu, Weiming Chen
Summary: Little is known about the situation of children on prolonged mechanical ventilation in mainland China. A multicenter retrospective investigation was conducted to describe the clinical characteristics and prognosis of Chinese children receiving long-term ventilation in pediatric intensive care units. The study revealed a steady increase in the number of children receiving prolonged mechanical ventilation in Chinese PICUs with distinct clinical characteristics and outcomes.
PEDIATRIC PULMONOLOGY
(2023)
Article
Chemistry, Physical
Yanqing Zhu, Pin Lv, Min Hu, Sonia R. Raga, Huiyu Yin, Yuxi Zhang, Ziqi An, Qinglong Zhu, Gan Luo, Wangnan Li, Fuzhi Huang, Monica Lira-Cantu, Yi-Bing Cheng, Jianfeng Lu
Summary: Surface passivation with a bulky fluorinated phenmethylammonium salt is found to enhance the performance of perovskite solar cells by reducing defects, suppressing recombination, and improving interfacial charge transfer. The efficiency of small-area devices increased from 20.7 +/- 0.9% to 22.8 +/- 0.4%, and a stabilized efficiency of 18.0% was achieved for larger-area modules. Additionally, non-encapsulated modules showed improved stability at ambient conditions.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Wenjian Shen, Haoyu Cai, Yingjie Kong, Wei Dong, Cong Bai, Guijie Liang, Wangnan Li, Juan Zhao, Fuzhi Huang, Yi-Bing Cheng, Jie Zhong
Summary: A series of protic amine carboxylic acid ion liquids are used as precursor additives to regulate the crystal growth and phase transition of alpha-FAPbI(3), resulting in the optimization of the phase transition process. The functional groups of carboxyl and ammonium passivate lead ions, vacancies, and organic vacancies, eliminating nonradiative recombination. The small-area devices incorporated with methylammonium butyrate (MAB) and n-butylammonium formate (BAFa) additives achieved champion efficiencies of 25.10% and 24.52%, respectively, while large-area modules achieved PCEs of 21.26% and 19.27% for MAB and BAFa additives, demonstrating the potential for commercializing large-area perovskite solar cells.
Article
Chemistry, Multidisciplinary
Letian Dai, Pere Roca i Cabarroca, Huaxia Ban, Zhiguo Zhang, Qiang Sun, Xiongjie Li, Anjie Gu, Wanpeng Yang, Haixuan Yu, Yan Shen, Mingkui Wang
Summary: This work presents the first highly efficient single-crystal cesium tin triiodide (CsSnI3) perovskite nanowire solar cell. The single-crystal CsSnI3 perovskite nanowires possess a perfect lattice structure, low carrier trap density, long carrier lifetime, and excellent carrier mobility, making them a promising candidate for flexible perovskite photovoltaics. By using CsSnI3 single-crystal nanowire in combination with highly conductive wide bandgap semiconductors, an unprecedented efficiency of 11.7% under AM 1.5G illumination is achieved. This study demonstrates the feasibility of tin-based perovskite solar cells and opens up possibilities for powering flexible wearable devices in the future.
Article
Chemistry, Physical
Yanbin Zhu, Peize Li, Xiaoju Yang, Muqin Wang, Yali Zhang, Pengkun Gao, Qikang Huang, Yan Wei, Xuan Yang, Deyu Wang, Yan Shen, Mingkui Wang
Summary: This study presents a new SnCuxO2+x nanocluster electrocatalyst encapsulated in siliceous MFI zeolites (SnCuxO2+x@MFI) for efficient CO2 reduction to methane. The catalyst exhibits good selectivity and high Faradaic efficiency in alkaline electrolyte. Using this catalyst as the cathode in a Li-CO2 battery achieves high discharge specific capacity and long operational life.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jie Pan, Peize Li, Xingxing Jiang, Yan Shen, Mingkui Wang
Summary: This study presents a two-step electrodeposition method to prepare few-atomic-layer thin bismuth nanosheets (BiNSs) for electrochemical CO2 reduction towards formate, with Br serving as a structure-inducing agent. The BiNSs exhibit impressive CO2 reduction performance, resulting in large current density and high Faradic efficiency for formate production. The presence of a magnetic field significantly increases magneto-current density and formate yield, with a high Faradic efficiency over a wide potential range. In-situ spectroscopic analysis, isotopic labeling characterization, and ultramicroelectrode voltammetric measurement reveal that the enhancement in CO2 reduction capability on BiNSs is mainly attributed to magnetic field-facilitated spin evolution process and magnetohydrodynamic effect.
MATERIALS TODAY PHYSICS
(2023)
Article
Energy & Fuels
Fuping Zhao, Jialing Zhong, Lixin Zhang, Peng Yong, Jianfeng Lu, Mi Xu, Yi-bing Cheng, Zhiliang Ku
Summary: Thin-film solar cells based on organic-inorganic hybrid perovskite light absorbers have received significant attention. Various strategies have been developed for depositing high-quality perovskite thin films, but there is still a need for further developments in vacuum and vapor-based techniques. A novel two-step vapor-solid reaction procedure for the deposition of high-quality methylamine-free hybrid perovskite thin films is proposed, resulting in improved crystallinity and efficiency.
Article
Chemistry, Multidisciplinary
Miao Yang, Hao Tan, Shiyu Ma, Yue Mi, Lifeng Liu, Zongyan Zhao, Hong Li, Dehua Xiong
Summary: Cu-BTC-IPA and Co(NO3)(2)& BULL;6H(2)O precursors were used to synthesize CuCoO2 (CCO) nanocrystals with desired crystal phase and morphology. The effects of Fe doping on the crystal structure and oxygen evolution reaction (OER) performance of CCO were investigated. The results showed that Fe doping improved the OER catalytic performance of CCO by reducing the Gibbs free energy and promoting the formation of intermediates.
Article
Chemistry, Inorganic & Nuclear
Zhi Yang, Hao Tan, Yu Qi, Shiyu Ma, Jilin Bai, Lifeng Liu, Dehua Xiong
Summary: This work successfully synthesized a nanostructured Fe-doped cobalt-based telluride catalyst with excellent oxygen evolution reaction (OER) performance. Fe doping was found to improve OER activity and long-term catalytic stability. This study provides a new approach for the preparation of bimetallic telluride catalysts with enhanced OER performance.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Shiyu Ma, Miao Yang, Na Han, Lifen Shi, Liang Wang, Jilin Bai, Dehua Xiong
Summary: CuCoO2 (CCO) nanocrystals were derived from Cu-BTC/Cu-BTC-IPA precursors using the solvothermal method, and their application in electrocatalytic oxygen evolution reaction (OER) was investigated. The study provides a new approach for the preparation of delafossite oxide CCO and the enhancement of their OER performances by tailoring the organic ligands of MOF precursors.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)
