Review
Engineering, Chemical
Yin Xie, Yongcheng Jin, Lan Xiang
Summary: Lithium rich layered oxides (LLOs) are promising cathode materials for Li-ion batteries with high capacity and suitable voltage, but they face serious voltage and capacity fading issues. This review covers an overview of LLOs' crystal structure, band structure and electrochemical performances, as well as current understanding on oxygen loss, capacity fading and voltage fading, followed by a review of five strategies to mitigate capacity and voltage fading. It is believed that these understandings can help address the fading problems of LLOs.
Article
Chemistry, Multidisciplinary
Qin Wang, Meng Yao, Aipeng Zhu, Qian Wang, Hao Wu, Yun Zhang
Summary: A simple surface modification method is designed to solve the performance degradation and structural collapse issues of Li-rich layered oxides (LRLOs). The modified material (LRLO@LMO@LNO) exhibits an ultra-high discharge capacity and very small voltage attenuation, even at high current densities.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Yameng Fan, Wenchao Zhang, Yunlong Zhao, Zaiping Guo, Qiong Cai
Summary: The article discusses the potential of lithium-rich oxides as promising cathode materials for lithium-ion batteries, comparing the characteristics and performance of layered and disordered-rocksalt structured lithium-rich oxides. The challenges and strategies for improving the electrochemical performance of these materials are also highlighted, along with possible directions for future development.
ENERGY STORAGE MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Da-Ae Lim, Young-Kyeong Shin, Jin-Hong Seok, Dayoung Hong, Kyoung Ho Ahn, Chul Haeng Lee, Dong-Won Kim
Summary: In this study, a TMAEPPi additive was synthesized to enhance the cycling characteristics and thermal stability of high-capacity NCM cathode materials. TMAEPPi formed a stable CEI layer, suppressing electrolyte decomposition and reducing material microcracking, which improved the performance of lithium-ion batteries.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Jingteng Zhao, Yuan Liang, Xu Zhang, Zihe Zhang, Errui Wang, Shiman He, Boya Wang, Zhijie Han, Jun Lu, Khalil Amine, Haijun Yu
Summary: This study demonstrates an in situ anchoring + pouring synergistic cathode-electrolyte interphase (CEI) construction using HTCN and TMSP electrolyte additives to alleviate the challenges faced by high-energy-density Li-rich layered oxides in conventional electrolytes. The uniform and robust in situ constructed CEI layer suppresses transition metal dissolution, shields the cathode against diverse side reactions, and significantly improves electrochemical performance with minimal discharge voltage decay. Insights into enhancing the performance of high-energy and high-voltage cathode materials through effective, convenient, and economical electrolyte approaches are provided.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Xin Ma, Dongyu Feng, Yinglin Xiao, Yunxian Qian, Qingrong Wang, Yuanyuan Kang, Dongwei Xu, Huajun Zhao, Hongli Xu, Huan Yi, Jiaxin Zheng, Jun Wang, Chaoyang Wang, Yonghong Deng
Summary: In this study, LiHFDF was employed as a novel electrolyte additive to generate LiF-abundant interphase on LLRO, leading to improved capacity retention and Coulombic efficiency, as well as mitigation of interfacial side reactions and voltage decay issues. This work provides an effective LiF-generating electrolyte additive for high-voltage LLROs, with potential benefits for other high-voltage cathode materials.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Ye Jin Jeon, Jaeho Lee, Young-Kyu Han, Taeeun Yim
Summary: This study introduces a functional additive, 1,2-propyleneglycol sulfite (PGS), to improve the interfacial stability of Ni-rich NCM cathode materials by creating artificial cathode-electrolyte interphase (CEI) layers that inhibit electrolyte decomposition. The addition of 2.0 wt% PGS significantly enhances the cycling performance of the cells.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(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.
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
Chemistry, Physical
Jinyang Dong, Feng Wu, Jiayu Zhao, Qi Shi, Yun Lu, Ning Li, Duanyun Cao, Wenbo Li, Jianan Hao, Xulai Yang, Lai Chen, Yuefeng Su
Summary: Through the design of an amine-functionalized mesoporous molecular sieve additive with active oxygen/water scavenging capability, a multifunctional self-reconstructive CEI layer with modified mechanical/electrochemical stability was constructed, resolving the issues induced by collaboration failure mechanism between manganese-based oxide and electrolyte in lithium-ion batteries. This design provides new insights into achieving a high-stability and high-energy-density lithium-ion battery system.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Su Ma, Xiaodong Zhang, Shumeng Wu, Ersha Fan, Jiao Lin, Renjie Chen, Feng Wu, Li Li
Summary: To enhance the electrochemical performance and safety of lithium-ion batteries, it is essential to understand the evolution of structure and interface during charge-discharge cycling. This study investigates the dominant mechanism behind the nonlinear capacity fading of Ni-rich electrode materials at different charge-discharge rates. Low-rate charge-discharge exhibits high initial discharge capacity, but cumulative stress release during the cycle quickly reduces its capacity. High-rate cycling, on the other hand, shows rapid decay of initial capacity due to CEI thickening and electrolyte decomposition caused interfacial side reactions. Pulverization from microcrack expansion and intensified side reactions between the new exposed interface and electrolyte contribute significantly to the end-of-cycle capacity decay. The change in dominant mechanism is one of the key factors causing the nonlinear capacity fading. This work provides new insights into the capacity decay and failure of lithium-ion batteries during cycling.
ENERGY STORAGE MATERIALS
(2023)
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)
Review
Chemistry, Multidisciplinary
Shuoqing Zhao, Kang Yan, Jinqiang Zhang, Bing Sun, Guoxiu Wang
Summary: Layered lithium-rich cathode materials with high theoretical specific capacity have regained interest due to the increasing reliance on high-energy-density lithium-ion batteries. Research progress on the structure characterization and reaction mechanisms of these materials has been reviewed, focusing on both cationic and anionic redox reactions. The future development of lithium-rich cathode materials for next-generation lithium-ion batteries faces opportunities and challenges.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Zhenghua Zhang, Jiugang Hu, Yang Hu, Hongmei Wang, Huiping Hu
Summary: This work investigates the effect of an advanced electrolyte additive on the performance of Ni-rich LiNixCoyMn1-x-yO2/graphite batteries. The results show that the additive induces the formation of robust electrolyte/electrode interphase, significantly improving the cycling performance and reducing the cell impedance. The capacity retention rate of the cells with the additive-based electrolyte can reach 90% after 600 cycles, which is considerably better than that of baseline batteries (70%). Mechanistic studies reveal that the additive suppresses the formation of fragile Li2CO3 and promotes the formation of more stable LiF, LixPOyFz, and additional organic phosphorus species on the electrode surface, thereby preventing cation disorder and irreversible phase transitions.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Xinlan Wang, Ziqi Zeng, Han Zhang, Mingsheng Qin, Yanli Zhu, Jia Xie
Summary: The introduction of 1,3,5-trifluorobenzene (F3B) as an additive for lithium-ion battery electrolytes can result in a solid electrolyte interface (SEI) rich in LiF. Compared to traditional fluorinated additives, F3B exhibits superior thermal stability and has a lower likelihood of generating hydrogen fluoride (HF) to damage the cathode.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Wenguang Zhang, Lidan Xing, Jiawei Chen, Hebin Zhou, Shimin Liang, Weiyi Huang, Weishan Li
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Chemistry, Physical
Guangyuan Lan, Lidan Xing, Dmitry Bedrov, Jiawei Chen, Rude Guo, Yanxia Che, Zifei Li, Hebin Zhou, Weishan Li
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Chemistry, Physical
Zhangmin Hu, Kang Wang, Yanxia Che, Mingzhu Liu, Wenguang Zhang, Lidan Xing, Hai Wang, Suli Li, Xiang Liu, Weishan Li
Summary: The novel electrolyte additive NOB improves the cycle life and stability of nickel-rich oxide/graphite cells under high voltage operation by eliminating hydrogen fluoride and forming N-containing interphases on the cathode to suppress parasitic electrolyte decomposition reactions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Mingzhu Liu, Jenel Vatamanu, Xinli Chen, Lidan Xing, Kang Xu, Weishan Li
Summary: By combining theoretical and experimental approaches, this study identified the direct reaction between water and PF6- as the main source of corrosive HF in Li-ion batteries. This hydrolysis process is accelerated by high voltage, highlighting the need for effective mitigation strategies to stabilize LiPF6-based electrolytes for high voltage LIBs. Clarifying this important electrolyte failure mechanism points to the potential for improved battery performance and longevity.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Applied
Qiming Xie, Jiawei Chen, Lidan Xing, Xianggui Zhou, Zekai Ma, Binhong Wu, Yilong Lin, Hebing Zhou, Weishan Li
Summary: The dissolution, migration, and deposition of transition metal ions can cause capacity degradation in lithium-ion batteries. This study investigated the deposition of cobalt on a graphite anode with and without a solid electrolyte interphase (SEI) film. The presence of the SEI film was found to aggravate the deposition of cobalt ions and accelerate the capacity fading of the graphite anode.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zekai Ma, Huiyang Chen, Hebing Zhou, Lidan Xing, Weishan Li
Summary: Enhancing the interphasial stability of high-voltage LMNO cathodes is crucial for commercial application, and using the cost-efficient 4TP additive can significantly improve cycle stability and rate performance of the battery.
Article
Chemistry, Multidisciplinary
Guanjie Li, Zifei Li, Qinqin Cai, Chong Yan, Lidan Xing, Weishan Li
Summary: A low-cost electrolyte additive, phenylboronic acid (PBA), was used to improve the performance of NCM811 cathode at high voltage and low temperature. PBA constructed a highly conductive and steady cathode electrolyte interphase (CEI) film, leading to enhanced cycling capacity and improved discharge capability at low temperature.
Article
Chemistry, Physical
Weishan Li, Tiantian Li, Jialuo Lin, Lidan Xing, Yaotang Zhong, Huifang Chai, Wude Yang, Jianhui Li, Weizhen Fan, Jingwei Zhao
Summary: This study investigates the mechanism of nitrile additives in improving the performance of commercialized lithium-ion batteries. The results show that nitrile compounds can preferentially oxidize on LiCoO2, forming a protective interphase and suppressing electrolyte oxidation decomposition, thereby enhancing the stability of the LiCoO2 cathode.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Sanjit Mondal, Gabriel Mark, Liel Abisdris, Junyi Li, Tirza Shmila, Jonathan Tzadikov, Michael Volokh, Lidan Xing, Menny Shalom
Summary: We report a general method to synthesize highly dispersed porous CN materials for photocatalysis and photoelectronic devices. This method provides a convenient way to fabricate homogenous CN layers strongly bound to a given substrate.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Yanxia Che, Guanjie Li, Caixing Li, Yating Xiezhang, Wenguang Zhang, Lidan Xing, Weishan Li
Summary: The instability of the electrode/electrolyte interface is currently hindering the application of high-voltage cathodes. Electrolyte oxidation and product accumulation cause an increase in electrode polarization, leading to degradation in cycle life, rate capability, and low-temperature performance. This study proposed the use of a novel electrolyte film-forming additive, lithium tetraborate (Li2TB), to create a stable and low-impedance interphase on the Ni-rich cathode surface. The LiNi0.6Co0.2Mn0.2O2 (NCM622)/Li half-cell with 2 wt% Li2TB showed an increased capacity retention from 50% to 76% after 300 cycles. At low temperatures, the capacity retention with Li2TB was 99%, compared to 47% without the additive. The effectiveness of Li2TB in enhancing interphasial stability was further confirmed in a 2 Ah-grade NCM622/graphite pouch cell. The mechanism of the additive was proposed based on theoretical calculations and experimental results.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Yuanqin Li, Mingzhu Liu, Kang Wang, Chengfeng Li, Ying Lu, Aditya Choudhary, Taylor Ottley, Dmitry Bedrov, Lidan Xing, Weishan Li
Summary: A new single-component solvent dimethoxy(methyl)(3,3,3-trifluoropropyl) silane is proposed as an effective electrolyte for high-voltage Li-metal batteries. This electrolyte, when combined with 3 m LiFSI salt, can support the long-term cycle stability of limited-Li||high loading LiCoO2 cells at 4.6 V. Its outstanding performance is attributed to its unique solvation structures and its ability to build a stable and robust interphase on the surface of Li-metal anodes and high-voltage cathodes.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jiawei Chen, Yu Peng, Yue Yin, Mingzhu Liu, Zhong Fang, Yihua Xie, Bowen Chen, Yongjie Cao, Lidan Xing, Jianhang Huang, Yonggang Wang, Xiaoli Dong, Yongyao Xia
Summary: Electrolyte plays a critical role in high-energy sodium metal batteries. In this study, a tailored carbonate-based electrolyte with lithium difluorobis(oxalato) phosphate (LiDFBOP) as an additive was fabricated to achieve stable electrode reactions and control electrolyte stability. The optimized electrolyte demonstrated improved coulombic efficiency, prolonged battery life, high energy density, and cycling stability for high-energy sodium metal chemistries.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Qinfeng Zheng, Guanjie Li, Xiongwen Zheng, Lidan Xing, Kang Xu, Weishan Li
Summary: Sulfolane shows great potential as an electrolyte for lithium-ion batteries due to its non-flammability and high oxidation stability, but its incompatibility with graphitic anode limits its advantages. By increasing the fluorine content in the solvation sheath, a stable LiF-rich interphase on graphite can be formed, providing new insights into overcoming the failure mechanism and unlocking potential electrolyte solvent candidates for future high-voltage cathode materials in LIBs.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Chemistry, Physical
Rotem Geva, Natasha Ronith Levy, Jonathan Tzadikov, Reut Cohen, Michal Weitman, Lidan Xing, Liel Abisdris, Jesus Barrio, Jiawei Xia, Michael Volokh, Yair Ein-Eli, Menny Shalom
Summary: This work demonstrates the optimized nickel phosphides as electrocatalysts for the hydrogen evolution reaction in acidic media and as anode materials in Li-ion batteries, showing a clear composition-activity trend. The synthesis method allows for fine-tuned particles of nickel phosphide phases ranging from Ni3P to Ni2P, achieved through a direct thermal reaction of nickel nitrate hexahydrate and triphenylphosphine.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Jiawei Xia, Neeta Karjule, Biswajit Mondal, Jiani Qin, Michael Volokh, Lidan Xing, Menny Shalom
Summary: A new supramolecular assembly family is designed as reactants to synthesize highly-photoactive porous polymeric carbon nitride (CN), which demonstrates state-of-the-art activity for hydrogen evolution reaction and CO2 reduction. This is achieved through enhanced charge separation and light absorption, appropriate energy bands position, and high specific surface area.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
