Review
Chemistry, Physical
Lu Nie, Shaojie Chen, Wei Liu
Summary: This article introduces the importance of high-voltage cathode materials in lithium-ion batteries and their relationship with lattice structure and electrochemical properties. It also discusses the degradation mechanisms and corresponding modification strategies, highlighting recent progress and strategies such as element doping, surface coating, morphology design, and size control. Finally, a concise perspective for future developments and practical applications of lithium-rich layered oxides has been provided.
Article
Nanoscience & Nanotechnology
Panawan Vanaphuti, Yangtao Liu, Xiaotu Ma, Jinzhao Fu, Yulin Lin, Jianguo Wen, Zhenzhen Yang, Yan Wang
Summary: The study successfully integrated Na/F co-doping and AlF3 coating on LMR cathode materials to enhance their electrochemical performance and ionic conductivity, while alleviating structural degradation and metal dissolution issues. This represents a new strategy to improve structural homogeneity and moves closer to commercial viability.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Ceramics
Bing Huang, Meng Wang, Guodong Xu, Lin Hu, Lin Chen, Yijie Gu
Summary: The study found that doping La into the lithium-rich cathode material improved capacity retention rate, rate capability, and Li+ diffusion coefficient. The presence of La stabilized the material structure, induced the formation of spinel phase, and provided additional diffusion channels for lithium ions. Additionally, the porous structure of the doped samples contributed to the excellent electrochemical performance.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Applied
Yuqiong Kang, Xingang Guo, Zhiwu Guo, Jiangang Li, Yunan Zhou, Zheng Liang, Cuiping Han, Xiangming He, Yun Zhao, Naser Tavajohi, Baohua Li
Summary: In this study, the LMR Li1.2Mn0.6Ni0.2O2 was modified by phosphorus (P)-doping to enhance Li+ conductivity in the bulk material, resulting in improved rate and safety performance. The introduction of P5+ doping increased the distance between crystal planes and enhanced structural stability, leading to better rate and thermal performance. First-principles calculations showed that P-doping facilitates electron transfer and forms strong covalent bonds to stabilize the material structure, while solid-state electrolyte modification further improved cycle performance and initial coulombic efficiency.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Engineering, Environmental
Shenghua Yuan, Hongzhou Zhang, Dawei Song, Yue Ma, Xixi Shi, Chunliang Li, Lianqi Zhang
Summary: W doping and layered@spinel@Li2WO4 co-modification structure can effectively enhance the structural stability and rate performances of lithium-rich layered oxides, improving their electrochemical performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Wei Yang, Qian Xie, Kaibin Fang, Chengyun Wang, Hanbo Zou, Shengzhou Chen
Summary: Nickel-rich layered materials are crucial for power battery applications, but the presence of Ni3+ can cause lattice deterioration during cycling. By increasing the content of cobalt in LiNi0.8-xCo0.1+xMn0.1O2, researchers were able to inhibit adverse phase transitions and improve the cycling and rate performance of the materials. This study highlights the importance of cobalt in enhancing the stability and efficiency of nickel-rich layered materials.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Pilgun Oh, Jeongsik Yun, Jae Hong Choi, Gyutae Nam, Seohyeon Park, Tom James Embleton, Moonsu Yoon, Se Hun Joo, Su Hwan Kim, Haeseong Jang, Hyungsub Kim, Min Gyu Kim, Sang Kyu Kwak, Jaephil Cho
Summary: In this study, a secondary doping ion substitution method is proposed to improve the electrochemical reversibility of LCO materials for Li-ion batteries. The utilization of Na ions as functional dopants and Fe-ion substitution improves the capacity retention and cycling stability of LCO. This provides a new avenue for the manufacturing of layered cathode materials with a long cycle life.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Ruizhi Yu, Mohammad Norouzi Banis, Changhong Wang, Bing Wu, Yan Huang, Shuang Cao, Junjie Li, Sidra Jamil, Xiaoting Lin, Feipeng Zhao, Wenhuai Lin, Baobao Chang, Xiukang Yang, Huan Huang, Xianyou Wang, Xueliang Sun
Summary: This study presents a successful strategy to enhance the Li+ ion diffusivity of LRMOs by introducing Te6+ and forming a protective layer on the material surface to inhibit structural degradation. The modified material exhibits good cycling performance and rate capability, with significantly reduced voltage decay during cycling.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Physical
Lianshan Ni, Hongyi Chen, Wentao Deng, Baowei Wang, Jun Chen, Yu Mei, Guoqiang Zou, Hongshuai Hou, Rui Guo, Jingying Xie, Xiaobo Ji
Summary: A stable Sr-doped Ni-rich cathode with a well-designed crystal structure and enhanced electrochemical performance was developed, showing great potential for practical applications in high-performance electric vehicles.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jidong Duan, Fengqi Wang, Mengjie Huang, Maoxia Yang, Shaomin Li, Gen Zhang, Chen Xu, Changyu Tang, Hao Liu
Summary: In this study, a new method of sodium tungstate-assisted sintering was proposed to fabricate high-performance single-crystal lithium-rich layered oxides (LLOs) cathode materials. The sodium tungstate promotes particle growth and forms a protective coating on the surface of LLOs particles, suppressing side reactions at the cathode/electrolyte interface. Additionally, trace amounts of sodium and tungsten doping stabilize the crystal structure and enhance the diffusion rate of Li+ ions.
Article
Electrochemistry
Mingru Su, Yichang Chen, Hongjia Liu, Jinlin Li, Kai Fu, Yu Zhou, Aichun Dou, Yunjian Liu
Summary: This study investigates the decay mechanism of structure and electrochemical properties of LiNi0.8Co0.1Mn0.1O2 materials during storage. It is found that the instability of Ni3+ leads to the appearance of NiO rock salt phase on the material's surface, accompanied by the formation of reactive oxygen species. The material reacts with H2O and CO2 in the air to form surface residual lithium compounds, hindering the diffusion kinetics of Li+ and resulting in capacity loss.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Zhen Wang, Junting Zhang, Fahai Dong, Pengdong Liu, Yongming Zhu, Peng Gao, Xiaoxiao Huang, Guangwu Wen
Summary: The study utilized density functional theory to investigate the formation energies and doping sites of 13 rare earth-doped LLMOs. It was found that heavy rare earth elements exhibit better doping effects compared to light rare earth elements. Yb doping, with the lowest formation energy, enhances TM-O hybridization and significantly reduces the evolution of lattice oxygen, leading to excellent electrochemical performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jue Zhang, Tangzhe Cao, Ying Lei, Jianying Li, Weifeng Fan, Bin Zhang, Xingyong Liu, Yujun Si, Honghui Wang
Summary: We proposed a selective lattice doping strategy to enhance the lattice stability of LiNi0.8Co0.1Mn0.1O2 by double element co-doping of Mg and W. The co-doping improved electrochemical reaction kinetics, discharge capacity, and suppressed structure degradation. The synergistic effect of W and Mg, including the formation of Ni2+ and increased layer structure stability, contributed to these improvements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Yu-Jie Guo, Chao-Hui Zhang, Sen Xin, Ji-Lei Shi, Wen-Peng Wang, Min Fan, Yu-Xin Chang, Wei-Huan He, Enhui Wang, Yu-Gang Zou, Xin'an Yang, Fanqi Meng, Yu-Ying Zhang, Zhou-Quan Lei, Ya-Xia Yin, Yu-Guo Guo
Summary: Chemical modification of electrode materials by heteroatom dopants is crucial for improving storage performance in rechargeable batteries. This study investigates the competitive doping chemistry of boron and aluminum in nickel-rich cathode materials. The atomic radii difference between B and Al leads to different spatial configurations of bonding with lattice oxygen. The findings provide insights into stabilizing the structural evolution and surface chemistry of the cathode.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Xiang Zhang, Guorong Hu, Ke Du, Zhongdong Peng, Weigang Wang, Chaopu Tan, Yongzhi Wang, Yanbing Cao
Summary: This paper introduces the synergistic modification of Ce doping and CeO2 coating to enhance the electrochemical performance of LiNi0.9Co0.05Mn0.05O2 cathode material. Ce doping improves the inner structure stability and lithium ion diffusion pathway, while CeO2 coating protects the cathode/electrolyte interface and enhances cycling performance.
Article
Materials Science, Multidisciplinary
Guohua Li, Zhimin Ren, Haoxiang Zhuo, Changhong Wang, Biwei Xiao, Jianwen Liang, Ruizhi Yu, Ting Lin, Alin Li, Tianwei Yu, Wei Huang, Anbang Zhang, Qinghua Zhang, Jiantao Wang, Xueliang Sun
Summary: This study investigates the crystal facet degradation behavior of lithium-rich layered oxides (LLOs) used as cathode materials for Li-ion batteries. It is found that different facets of LLO exhibit significant anisotropic degradation behavior, with particle degradation mainly originating from the (010) facet. Ab initio molecular dynamics calculations reveal that oxygen atoms are lost from the (010) facet, leading to the formation of crevice-voids in the ab plane.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ruizhi Yu, Changhong Wang, Hui Duan, Ming Jiang, Anbang Zhang, Adam Fraser, Jiaxuan Zuo, Yanlong Wu, Yipeng Sun, Yang Zhao, Jianwen Liang, Jiamin Fu, Sixu Deng, Zhimin Ren, Guohua Li, Huan Huang, Ruying Li, Ning Chen, Jiantao Wang, Xifei Li, Chandra Veer Singh, Xueliang Sun
Summary: Employing lithium-rich layered oxide (LLO) as the cathode in all-solid-state batteries (ASSBs) is desired for high energy density, but its poor kinetics due to low electronic conductivity and oxygen-redox-induced structural degradation hinders its application. This study enhances the charge transfer kinetics of LLO by constructing efficient electron transport networks within solid-state electrodes, reducing electron transfer resistance, and stabilizes the lattice oxygen of LLO through an infusion-plus-coating strategy, suppressing interfacial oxidation and structural degradation. The LLO-based ASSBs exhibit high discharge capacity and long cycle stability, providing important insights for the development of high-energy-density ASSBs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Shuang Cao, Jiarui Chen, Heng Li, Zhi Li, Changmeng Guo, Gairong Chen, Xiaowei Guo, Xianyou Wang
Summary: Li1.17Na0.02Mn0.54Ni0.13Co0.13O2 (PN-LMNCO) is prepared through surface phase structure controlling and ion doping to address the rapid capacity fading and voltage decay issues of Li-rich Mn-based cathode materials. The introduction of lithium deficiencies induces surface phase transformation and forms an in-situ spinel surface conversion film, effectively inhibiting structure degradation during charge/discharge. Additionally, sodium doping increases spacing between Li layers, improving the rate capacity. The PN-LMNCO exhibits high initial coulombic efficiency (91.2%), retains 94.7% discharge specific capacity after 200 cycles, and maintains good discharge capacity (214 mA h g(-1)) at a high current rate of 5 C. This work is important for the development of high-energy density lithium-ion batteries for electric vehicles.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Wenlong Xia, Mingyu Han, Yufang Chen, Ying Zhou, Hongbo Shu, Yan Chen, Jincang Su, Xianyou Wang
Summary: To improve the electrochemical properties of lithium-sulfur batteries, this study proposes a rational strategy of tuning the d-band of catalysts through the introduction of Fe into in situ grown Ni2P on rGO, resulting in NiFeP/rGO composites. The incorporation of Fe improves the metallic conduction of Ni2P and elevates the d-band center of NiFeP, effectively facilitating charge transfer and weakening the S-S bonds of polysulfides. As a functional interlayer, NiFeP/rGO composites not only promote the interaction between polysulfides and NiFeP but also accelerate the conversion of polysulfides. The high-efficiency NiFeP/rGO electrocatalyst demonstrates the availability of the d-band regulating strategy for lithium-sulfur batteries, providing insights into the redox reaction of LiPSs at the molecular or atom level.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Dongdong Zhang, Qiliang Wei, Haili Huang, Lan Jiang, Jie Teng, Ruizhi Yu, Qing Zhang, Shengxing Liu, Lin Wang, Weiyou Yang
Summary: Crystalline gamma-Ga2O3@rGO core-shell nanostructures were synthesized in gram scale using a facile sonochemical strategy under ambient conditions. The structures consisted of uniform gamma-Ga2O3 nanospheres encapsulated by reduced graphene oxide (rGO) nanolayers, with their formation attributed to the opposite zeta potential between Ga2O3 and rGO. The as-fabricated gamma-Ga2O3@rGO nanostructures exhibited improved reversible capacity and longer lifetime in lithium-ion batteries compared to pristine gamma-Ga2O3, largely due to a conversion reaction and alloying mechanism, as well as the self-healing ability of the discharged product of liquid metal Ga. The rGO shell also acted as a robust conductive network, enhancing the conductivity and contributing to efficient Li storage behaviors. This work provides insights for mass production of advanced electrode materials for energy storage and conversion applications under mild conditions.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Hui Duan, Changhong Wang, Ruizhi Yu, Weihan Li, Jiamin Fu, Xiaofei Yang, Xiaoting Lin, Matthew Zheng, Xiaona Li, Sixu Deng, Xiaoge Hao, Ruying Li, Jiantao Wang, Huan Huang, Xueliang Sun
Summary: Constructing a 3D lithium metal anode has been proven to be an effective strategy to solve dendrite issues in liquid batteries. However, it is challenging to apply this approach in all-solid-state Li metal batteries due to the rigidity of inorganic solid electrolytes. In this study, a 3D Li anode is constructed in situ for all-solid-state Li metal batteries by spontaneous chemical reactions between halide SEs and Li metal, providing a universal strategy and new insight perspective for high-performance all-solid-state Li metal batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Juan Yang, Jiao Peng, Yu Lei, Junqing Zeng, Guang Li, Yongqiang Shen, Baobao Chang, Liping Zheng, Xianyou Wang
Summary: A solvent-free mechanochemical method was used to prepare a calcium carbide-derived porous carbon (CCDPC) composite with polyaniline (PANI). The CCDPC/PANI composite showed a significantly improved specific capacitance and energy density compared to pure CCDPC, as well as good capacitance retention after cycling tests. This study provides important insights for enhancing the electrochemical performance of high-performance supercapacitors.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Changfei Zou, Zihao Zang, Xiyuan Tao, Lingguang Yi, Xiaoyi Chen, Xiaoyan Zhang, Li Yang, Xianhu Liu, Xianyou Wang
Summary: In this study, a thin layer of Li1.3Al0.3Ti1.7(PO4)(3) was used as an interface coating in lithium-ion batteries to improve the stability between the cathode and solid-state electrolyte. The nanoscale coating not only enhances lithium ion transport but also alleviates interfacial problems, leading to better capacity retention.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jiarui Chen, Shuang Cao, Zhi Li, Heng Li, Changmeng Guo, Ruijuan Wang, Lei Wu, Yixu Zhang, Yansong Bai, Xianyou Wang
Summary: In this study, homogeneous Li2ZrO3 (LZO) was successfully coated on the surface of Li1.2Mn0.54Ni0.13Co0.13O2 (LRO) by molten salt-assisted sintering technology. The as-prepared LRO@LZO composites have improved cycling performance due to the good chemical and electrochemical stability of LZO. Additionally, Li2ZrO3 acts as an excellent lithium-ion conductor, leading to increased lithium-ion transfer rate and improved rate capacity of LRO. Therefore, this study provides a new solution to enhance the structure stability and electrochemical performance of lithium-rich manganese-based cathode materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Yongqian He, Yixin Luo, Wanqi Zhang, Sisi Liu, Kai Zhu, Li Huang, Yue Yang, Xin Li, Ruizhi Yu, Hongbo Shu, Xianyou Wang, Manfang Chen
Summary: This work presents a heterogeneous structure MoO2/t-C3N4/S to overcome the shuttle effect of polysulfides in Li-S batteries. The material demonstrates excellent anchoring effect on polysulfides and bidirectional catalytic ability for the redox process of S species. It achieves high initial-discharge specific capacity and long cycle life, providing a trustworthy reference for future commercial application of Li-S batteries.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Xi Zhou, Xuelin Huang, Guang Li, Peng Zeng, Xiaolin Liu, Hong Liu, Manfang Chen, Xianyou Wang
Summary: A novel metal-organic framework (MOF) derivative called ZnCoFe-NC was designed and synthesized as a sulfur host for Li-S batteries. Its special hollow polyhedral structure provides physical trapping ability and chemisorption space for lithium polysulfides (LiPSs). The Zn, Co, Fe, and N doping not only have excellent chemisorption ability, but also high electrocatalytic activity, which accelerates the transformation of LiPSs and reduces their dissolution, improving the performance of Li-S batteries significantly.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Yu Dong, Dan Zhang, Li Huang, Yixin Luo, Jiaxiang Liu, Sisi Liu, Wanqi Zhang, Yongqian He, Ruizhi Yu, Hongbo Shu, Xianyou Wang, Manfang Chen
Summary: Ion electrokinetic regulation on separator is crucial for reducing polysulfide shuttling in Li-S batteries. Inspired by the electrostatic shielding effect, we implant a flexible skin composed of organic molecules (PDDA/PSS) with different charges anchored on carbon nanotubes (CNT), which act as a functional interlayer to prevent the shuttling of polysulfides. This proof-of-concept work offers new perspectives on how to tailor the ionic behaviors of separators for high-energy Li-S batteries.
Article
Chemistry, Physical
Heng Li, Zhi Li, Jiali Liu, Shuang Cao, Jiarui Chen, Hui Hu, Changmeng Guo, Xiaoyan Zhang, Xianyou Wang
Summary: The treatment of ammonium niobium oxalate can effectively improve the electrochemical performance of Co-free Li-rich layered oxides by creating oxygen vacancies and doping Nb5+ on the surface, leading to enhanced cycling stability and rate performance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Electrochemistry
Guang Li, Kuang Sheng, Yu Lei, Feng Zhang, Juan Yang, Tianjing Wu, Liping Zheng, Xianyou Wang
Summary: Transition metal sulfides are considered as candidate oxygen redox catalysts due to their high catalytic activity and reversible redox performance. This study successfully synthesized Co9S8-FeCoS2 two-phase nanoparticles anchored in carbon spheres, which exhibited excellent catalytic performance and stability. This work provides an important approach to prepare highly efficient and stable dual-transition metal sulfide-modified carbon-based catalysts for oxygen reduction and oxygen evolution reactions.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Changhong Wang, Shuo Wang, Xudong Liu, Yanlong Wu, Ruizhi Yu, Hui Duan, Jung Tae Kim, Huan Huang, Jiantao Wang, Yifei Mo, Xueliang Sun
Summary: This study investigates the influence of lithium ion and vacant site contents on ionic conductivity by synthesizing a range of solid solutions. It is found that achieving a balance in lithium ion and vacant site content is crucial for optimizing ion transport in a hexagonal close packing anion framework. The highest ionic conductivity and lowest activation energy are achieved in LLZC.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)