Article
Chemistry, Physical
Jinhe Wei, Fei Hu, Xiong Shen, Bingkun Chen, Lin Chen, Zhongming Wang, Chenglong Lv, Qiuyun Ouyang
Summary: The vertically oriented NiCo2S4/MnO2 core-shell nanocomposites, activated by oxygen vacancy engineering, show enhanced electrochemical performance. The hierarchical core-shell nanostructures increase conductivity and provide redox chemical reactions. The NiCo2S4/MnO2-60 electrode delivers appreciable areal capacity and rate capability, and can be used in solid-state hybrid supercapacitors with high energy density and cyclic stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Can Huang, Qiufan Wang, Guofu Tian, Daohong Zhang
Summary: This study reports a novel oxygen-deficient Mn3O4 nanoframes cathode for rechargeable aqueous zinc-ion batteries with high capacity and good electrochemical stability. The cathode spheres exhibit excellent gravimetric capacity and high energy density, with ex situ X-ray diffraction and X-ray photoelectron spectroscopy showing the mechanism of insertion and extraction of H+ and Zn2+. Theoretical modeling reveals that defect engineering can significantly improve the electrochemical performance of Mn3O4 in aqueous rechargeable batteries.
MATERIALS TODAY PHYSICS
(2021)
Review
Chemistry, Inorganic & Nuclear
S. Vinoth, Wee-Jun Ong, A. Pandikumar
Summary: This article summarizes the importance of BiOX materials in energy and environmental applications. BiOX has a layered structure and high photocatalytic activity, and its physical and chemical properties and photocatalytic activity can be enhanced by controlling defects. The article also discusses the role of defect engineering in improving the performance of BiOX and prospects the future research opportunities.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Yi-Xuan Liu, Wanbo Qu, Hao-Cheng Thong, Yang Zhang, Yunfan Zhang, Fang-Zhou Yao, Trong Nghia Nguyen, Jia-Wang Li, Mao-Hua Zhang, Jing-Feng Li, Bing Han, Wen Gong, Haijun Wu, Chaofeng Wu, Ben Xu, Ke Wang
Summary: This study proposes a method based on isolated oxygen vacancies to achieve a well-balanced performance of mechanical quality factor and piezoelectric coefficient in piezoelectric materials. The hardening effect associated with oxygen vacancies shows exceptional stability with increasing vibration velocity. This research has important implications for high-power applications such as pharmaceutical extraction and ultrasonic osteotomes.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jaeseo Lee, Kyeongseok Min, Yujin Son, Dasol Ko, Sang Eun Shim, Sung-Hyeon Baeck
Summary: A composite material, CoFe-LDH/Vo-Co3O4@C, has been developed with efficient surface modulation and abundant structural defect sites, which exhibits remarkable activity and long-term stability for the oxygen evolution reaction. The material shows a low overpotential and small Tafel slope, outperforming traditional RuO2 materials. Moreover, it demonstrates excellent electrocatalytic durability for over 100 hours in alkaline solution.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Huaile He, Chao Wu, Haizheng Hu, Shunli Wang, Fabi Zhang, Daoyou Guo, Fengmin Wu
Summary: Previous research has shown that hybridization of N 2p and O 2p orbitals effectively reduces the electrical activity of oxygen vacancies in oxide semiconductors. However, achieving N-alloyed Ga2O3 films, known as GaON, is challenging due to nitrogen's limited solubility in the material. This study explores a new method using plasma-enhanced chemical vapor deposition with high-energy nitrogen plasma to enhance nitrogen solubility. By adjusting the N-2 and O-2 carrier gas ratio, the thin film's bandgap can be tuned, resulting in a decrease in oxygen vacancy density and improved performance of GaON-based photodetectors.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Bingzhen Zhang, Jian Chen, Ying Li, Yahui Zhu, Yanping Yang, Sheng Liao, Weiming Xiao, Shuhua Wang, Pengfei Zhang, Yuan Shu, Shunli Shi, Chao Chen
Summary: This study presents a high-entropy oxide nanosheet with rich oxygen vacancies, which is fabricated by using a high-entropy metal organic framework as a precursor. The nanosheet exhibits excellent catalytic performance in the oxidation of benzyl alcohol, due to its substantial oxygen vacancies and large pores, which promote substrate activation and mass transfer.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Fabiane J. Trindade, Sergio Damasceno, Larissa Otubo, Marissol R. Felez, Daniel Z. de Florio, Fabio C. Fonseca, Andre S. Ferlauto
Summary: The design and control of the size, shape, and surface chemistry of nanomaterials, particularly ceria nanoparticles, have a significant impact on their properties. This study demonstrates the fine-tuning of structural defects and morphology of La-doped ceria nanoparticles through varying La doping ratios and hydrothermal synthesis temperature. The results provide valuable insights for the development of high-temperature oxide catalysts and other applications.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Yajie Guo, Yan Wang, Yu Zhang, Yi Zhai, Wangfeng Cai
Summary: Transition metal oxides are promising electrode materials for supercapacitors, but their applications are limited by slow charge transfer kinetics and insufficient active sites. This study reports the preparation of sulfur-doped zinc-nickel-cobalt oxides using heteroatom doping and defect engineering, which successfully increases the redox reaction active sites and improves the electrochemical kinetics of the electrode material. The results show a high specific capacitance and energy density for the SZNCO electrode, demonstrating the potential for advanced transition metal compounds in supercapacitors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Chen Wu, Xiaoming Qiu, Wenwei Ge, Luyao Chen, Changyi Liu, Hongwei Zhao, Zhaodong Liu, Liang Li, John G. Fisher
Summary: In this study, BFBT-xNN ceramics were fabricated using a solid-state reaction method to obtain high-performance capacitor materials. BFBT ceramics have excellent dielectric and ferroelectric properties, but their energy storage performance is limited by the large hysteresis of their polarization-electric field loops and the low dielectric breakdown strength. A co-doping strategy was designed to overcome these limitations by introducing Nd3+ and Nb5+ ions simultaneously at the A- and B-sites of BFBT ceramics, enhancing their relaxor properties and improving their dielectric breakdown strength.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Shuo Zheng, Walter W. Duley, Peng Peng, Y. Norman Zhou
Summary: Defect engineering in CuO nanomaterials, particularly the control of oxygen vacancies (VO) and copper vacancy centers (VCu), has been studied for their impact on CuO properties. Increasing the concentration of VO enhances optical absorption in the visible region, while laser-induced VCu centers increase carrier concentration in CuO.
APPLIED SURFACE SCIENCE
(2024)
Article
Nanoscience & Nanotechnology
Zehao Sun, Jie Wei, Tiantian Yang, Yunpeng Li, Zhiting Liu, Guogang Chen, Tiangang Wang, Hai Sun, Zhenxiang Cheng
Summary: Research has successfully improved the photocurrent density of BiFeO3 through the cooperative effect of gradient distribution of oxygen vacancies and induced flexoelectric effect, providing a new approach to enhance the efficiency of photovoltaic energy.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Daming Chen, Youchun Wu, Zhiquan Huang, Jian Chen
Summary: This study proposes a hybrid point defects engineering method to synthesize TiO2 materials, and investigates their electrical conductivity and sodium storage performance through electrochemical testing and calculations. The results show that the hybrid point defects engineering can significantly improve the kinetics behavior and electrical conductivity of TiO2 materials, resulting in excellent performance.
NANO-MICRO LETTERS
(2022)
Article
Engineering, Environmental
Xingwang Zhu, Jinman Yang, Xianglin Zhu, Junjie Yuan, Min Zhou, Xiaojie She, Qing Yu, Yanhua Song, Yuanbin She, Yingjie Hua, Huaming Li, Hui Xu
Summary: Oxygen vacancies have deep effects on photocatalysts, enhancing the efficiency and activity of CO2 photoreduction. Particularly for n-type semiconductors, introducing oxygen vacancies can optimize band structure and facilitate reactions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Mohua Li, Shijie You, Xiaoguang Duan, Yanbiao Liu
Summary: Defect engineering is an effective method to understand the relationship between structure and catalytic activities of transition metal oxides. In this study, a novel strategy was developed to control the oxygen vacancy levels and modify the surface chemistry of a catalytic membrane. The increased number of Lewis acid sites in the membrane resulted in enhanced catalytic activities.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Electrochemistry
Liang Hao, Koji Moriyama, Wenbin Gu, Chao-Yang Wang
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2015)
Article
Thermodynamics
Guodong Wang, Liang Hao, Ping Cheng
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2010)
Article
Thermodynamics
Liang Hao, Ping Cheng
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2010)
Article
Thermodynamics
Liang Hao, Ping Cheng
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2010)
Article
Thermodynamics
Liang Hao, Ping Cheng
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2012)
Article
Chemistry, Physical
Brian Carnes, Dusan Spernjak, Gang Luo, Liang Hao, Ken S. Chen, Chao-Yang Wang, Rangachary Mukundan, Rodney L. Borup
JOURNAL OF POWER SOURCES
(2013)
Article
Electrochemistry
Yuanhui Wang, Liang Hao, Minlin Bai
Summary: The presence of CO2 in Li-O-2/CO2 batteries can increase discharge voltage and capacity, while the increase of CO2 diffusivity is beneficial to battery capacity. Accumulation of Li2CO3 during cycling significantly impacts the capacity decay of the battery.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Energy & Fuels
Yuanhui Wang, Liang Hao, Minli Bai
Summary: The influence of water on the performance of lithium-oxygen batteries is significant. High concentrations of water can enhance initial discharge capacity, but the capacity decreases with cycles. Low concentrations of water lead to cathode blockage, while high concentrations of water increase corrosion of both cathode and anode.
Article
Chemistry, Physical
Baoyi Yin, Liang Hao, Xiaogan Li
Summary: Battery-type materials are promising electrode materials for supercapacitors due to their high theoretical capacitance, but suffer from poor electrode kinetics, resulting in lower practical capacitance. To address this issue, researchers used oxygen-vacancy-abundant Co-MoO3-x microspheres and adjusted the internal crystal structure to improve proton ion transport. The prepared asymmetric supercapacitor device using Co-MoO3-x exhibited high specific capacitance, energy density, and excellent capacitance retention. This research demonstrates the potential of internal crystal structure adjustment for enhancing the performance of electrode materials in high-performance supercapacitors.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Electrochemistry
Yuanhui Wang, Liang Hao
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Article
Electrochemistry
Liang Hao, Yuanhui Wang, Yusong He
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Proceedings Paper
Energy & Fuels
Ken S. Chen, Brian Carnes, Liang Hao, Gang Luo, Chao-Yang Wang
PROCEEDINGS OF THE ASME 10TH FUEL CELL SCIENCE, ENGINEERING, AND TECHNOLOGY CONFERENCE, 2012
(2012)
Proceedings Paper
Energy & Fuels
Brian Carnes, Ken S. Chen, Liang Hao, Gang Luo, Yan Ji, Chao-Yang Wang, Dusan Spernjak
PROCEEDINGS OF THE ASME 9TH INTERNATIONAL CONFERENCE ON FUEL CELL SCIENCE, ENGINEERING, AND TECHNOLOGY 2011
(2012)
Proceedings Paper
Energy & Fuels
Ken S. Chen, Brian Carnes, Liang Hao, Yan Ji, Gang Luo, Chao-Yang Wang, Yun Wang
PROCEEDINGS OF THE ASME 9TH INTERNATIONAL CONFERENCE ON FUEL CELL SCIENCE, ENGINEERING, AND TECHNOLOGY 2011
(2012)
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)