Article
Chemistry, Physical
Seong Jin An, Ji Eun Kim, Somi Yu, Ki Jung Kim, Minjoong Kim, Jong Hak Kim, Jae Hun Lee, Won Seok Chi
Summary: In this study, a uniformly blended membrane was fabricated by incorporating chloromethylated triptycene and brominated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO). The dual-quaternized BPPO/triptycene-Cl blended membrane showed enhanced hydroxide ion conductivity and improved water electrolyzer cell performance compared to a commercial membrane. The dimensional stability of the blended membrane was effectively controlled, despite high water uptake, due to the increased free volume provided by the triptycene additive.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Jingxiong Gao, Songyi Han, Haiming Hua, Jie Wu, Jing Zeng, Yuanyu Sun, Weiping Tang, Shuling Liu, Jinbao Zhao
Summary: The novel electrolyte additive PTM has been found to enhance the electrochemical behavior of NCM-based high-energy lithium-ion batteries over a wide temperature range. The PTM-containing electrolyte showed significantly higher capacity retention at 25°C, -20°C, and 45°C compared to standard electrolyte, indicating improved stability and performance of the battery cells.
JOURNAL OF POWER SOURCES
(2021)
Article
Nanoscience & Nanotechnology
Sewon Park, Gayoung Choi, Hyeong Yong Lim, Kyung Moon Jung, Sang Kyu Kwak, Nam-Soon Choi
Summary: In this study, a multifunctional electrolyte additive called BTSPFA was developed to enhance the interfacial stability of graphite anodes and Ni-rich cathodes in Li-ion cells. BTSPFA eliminates corrosive HF molecules, promotes the formation of a polar CEI on the Ni-rich cathode, and suppresses the reduction of the electrolyte. The synergistic effect of BTSPFA effectively prevents TM leaching from the cathode and unwanted TM deposition on the anode. LiNi0.8Co0.1Mn0.1O2/graphite full cells with 1 wt % BTSPFA showed enhanced discharge capacity retention of 79.8% after 500 cycles at 1C and 45°C.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Shaojun Niu, Guobin Zhu, Kai Wu, Honghe Zheng
Summary: The feasibility of using natural graphite (NG) instead of artificial graphite (AG) in organic electrolytes with different additives is investigated. Different gas evolution, lithium inventory loss and side reactions are observed despite the formation of a strong solid electrolyte interphase (SEI) film on the surface of graphite particles with strong film-forming additives. Lithium bis(oxalato)borate (LiBOB) and fluoroethylene carbonate (FEC) are found to be more effective, and their combination shows promise. In an optimized electrolyte, the natural graphite anode demonstrates excellent long-term cycling capability, comparable to that using artificial graphite after 800 cycles at high temperature. The mechanisms for the capacity fading in full cells with AG and NG anodes are investigated, revealing that NG consumes more active lithium due to its rough surface and larger volume expansion, and the rapid capacity fading in the initial 100 cycles is related to the instability of the SEI film caused by the large volume expansion. This systematic analysis provides inspiration for the development of high-performance lithium-ion batteries with reduced cost.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Jiasheng Lu, Xijun Xu, Weizhen Fan, Yong Xin, Wenlian Wang, Chaojun Fan, Pengfei Cheng, Jingwei Zhao, Jun Liu, Yanping Huo
Summary: In this research, phenyl 4-fluorobenzene sulfonate (PFBS) was investigated as an additive to improve the structural degradation of LiNi0.8Co0.1Mn0.1O2 (NCM811) cathodes and the chemical decomposition of electrolyte solvents. Experimental results show that PFBS can form a stable and uniform solid electrolyte interphase (SEI), significantly improving the cycling performance of the batteries.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Jiasheng Lu, Xijun Xu, Weizhen Fan, Yong Xin, Wenlian Wang, Chaojun Fan, Pengfei Cheng, Jingwei Zhao, Jun Liu, Yanping Huo
Summary: LiNi0.8Co0.1Mn0.1O2 (NCM811) cathodes paired with a graphite anode have shown promise for power lithium-ion batteries. In this study, phenyl 4-fluorobenzene sulfonate (PFBS) was investigated as an additive to suppress the structural degradation of NCM811 and improve the performance of the battery at different temperatures. Experimental results showed that a 1 wt % PFBS additive significantly improved the cycling performance of the battery and maintained a higher capacity retention. Theoretical calculations and spectroscopy analysis demonstrated the role of PFBS in stabilizing the solid electrolyte interphase and facilitating Li ion diffusion.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Metallurgy & Metallurgical Engineering
Grzegorz Smola, Richard Gawel, Tomasz Kupka, Michael Erb, Christoph Schnitter, Zbigniew Grzesik
Summary: The goal of this study was to determine the corrosion resistance of selected nickel-based and chromia-forming alloys in an industrial air-HF-H2O atmosphere at a temperature of 900 degrees C. The results showed that nickel-based materials exhibit worse oxidation resistance compared to the chromia formers. However, among the chromia-forming materials, the alloy with the highest nickel content demonstrated the best corrosion resistance.
OXIDATION OF METALS
(2022)
Article
Chemistry, Applied
Xin He, Yiting Li, Wenlian Wang, Xueyi Zeng, Huilin Hu, Haijia Li, Weizhen Fan, Chaojun Fan, Jian Cai, Zhen Ma, Junmin Nan
Summary: This study develops PHIS as a multi-functional electrolyte additive for H2O/HF scavenging and film formation to improve the high temperature performance of LiNi0.8Co0.1Mn0.1O2/graphite batteries. The batteries with PHIS-containing electrolyte exhibit higher discharge capacity retentions after cycling at room temperature and high temperatures, supported by spectroscopic characterization and theoretical calculations. This work not only develops a new sulfonate-based electrolyte, but also inspires new ideas for functional additives to improve battery performance.
JOURNAL OF ENERGY 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)