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)
Review
Energy & Fuels
B. Jeevanantham, M. K. Shobana
Summary: Fossil fuel consumption has severe ecological effects on the world economy, making it important to develop environmentally friendly energy devices. Lithium-ion batteries offer high capacity and stability, but face challenges such as residual lithium deposition, ion mixing, and oxygen release. Doping and coating techniques can improve the efficiency and stability of the cathode, but there is no single solution to address all the drawbacks, necessitating the combination of multiple strategies.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Electrical & Electronic
Xiaohong Zhang, Mingcan Wang, Jiayuan Shi, Xiaotao Chen, Fuliang Liu, Bin Shi
Summary: Ti doping can significantly improve the electrochemical performance of LiNi0.8Co0.2-xTixO2 cathode materials, leading to enhanced cycling performance and high rate capability.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Yu-hong Luo, Han-xin Wei, Lin-bo Tang, Ying-de Huang, Zhen-yu Wang, Zhen-jiang He, Cheng Yan, Jing Mao, Kehua Dai, Jun-chao Zheng
Summary: This review comprehensively summarizes the development of nickel-rich and cobalt-free cathode materials, highlighting their competitive advantages in reducing costs and increasing energy density. It emphasizes the importance of developing new materials and provides solutions and future research directions to address current deficiencies in this field.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Yu Huang, Kai Wu, Ronghui Hao, Wenkang Miao, Yueling Cai, Peng Wang, Jipeng Cheng, Zihan Wang, Qianqian Li, Bingkun Guo, Anmin Nie
Summary: Li2MnO3, as a traditional member of lithium-rich layered cathodes, shows large specific capacity, but suffers from capacity fading and voltage decay. Iridium doping improves electrochemical performance, with dopant concentration and calcination temperature affecting the performance due to intrinsic microstructure and crystallization. The mechanism of improvement lies in the structure stability induced by iridium doping in TM sites, enhancing high-capacity cathode materials for lithium-ion batteries.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jinmei Wu, Jianwen Yang, Jiawei Zheng, Mengwen Wang, Shengxian Li, Bin Huang, Yanwei Li, Qing Zhu, Quanqi Chen, Shunhua Xiao, Botian Liu
Summary: Highly pure and layered structural LiNi0.95Al0.025Ti0.025O2 cathode materials were synthesized by a sol-gel method, effectively solving the issues of cation mixing, structural deterioration, irreversible conversion between H2 and H3 phases, and unstable surface and CEI film. The obtained sample shows good discharge specific capacity, capacity retention, and Li+ diffusion coefficient.
Article
Chemistry, Physical
Aurora Gomez-Martin, Friederike Reissig, Lars Frankenstein, Marcel Heidbuchel, Martin Winter, Tobias Placke, Richard Schmuch
Summary: This study investigates the Mg substitution of Ni-rich LiNi1-x-yMnxCoyO2 (NMC) layered oxides and demonstrates a linear correlation between cycle life and attainable gravimetric capacities, which are influenced by the degree of Mg substitution and the amount of cycled Li+ ions. To achieve a higher energy density, a lower Mg content and higher Ni content should be considered.
ADVANCED ENERGY MATERIALS
(2022)
Article
Engineering, Chemical
Jiaxi Ni, Yingying Tan, Kang Xu, Yujie Jiang, Wanying Chang, Chunyan Lai, Hui Liu
Summary: A stable and high-performing cobalt-free cathode material LiNi0.9Al0.08Zr0.02O2 (NAZ-2) is successfully designed and synthesized by incorporating Zr4+ ions. It exhibits a high specific capacity and low polarization.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Electrochemistry
Lukman Noerochim, Suwarno Suwarno, Nurul Hayati Idris, Hermawan K. Dipojono
Summary: The exponential growth in production of electric vehicles has led to an increased demand for low-cost, high-performance lithium-ion batteries. However, concerns over the availability of cobalt, a high-cost and rare material used in high-nickel cathodes, may impact the price due to supply constraints. Developing cobalt-free high-nickel cathode materials, such as LiNi1-x-yMnxAlyO2, is necessary to address the reliance on cobalt and its high cost.
Article
Engineering, Chemical
Lipeng Xu, Chunjiang Bao, Haobing Zhou, Jun Li
Summary: Nickel-rich ternary cathode materials (NRTCMs) have attracted much attention due to their high energy density and extended cycle life. However, these materials often suffer from poor cycling performance and high-capacity decay rate. This study investigated the modification effect of WO3 on NRTCM lithium batteries and found that the addition of WO3 can effectively reduce the polarization of the material and improve the cycling and rate performance of the battery.
Article
Chemistry, Physical
Yue Li, Ying-de Huang, Jing-yi Li, Chang-long Lei, Zhen-jiang He, Yi Cheng, Fei-xiang Wu, Yun-jiao Li
Summary: In this study, B-doped cathode materials based on layered high-nickel ternary materials were synthesized and evaluated. The results showed that B doping can improve the lithium-ion diffusion rate and enhance the rate performance of the cathode materials. Moreover, boron doping also improved the mechanical properties of the materials and inhibited crack formation. This research provides a new approach for the modification of high-nickel ternary cathode materials and promotes their commercialization.
Article
Chemistry, Physical
Jiale Wang, Zhicheng Yi, Chengjin Liu, Manyi He, Chang Miao, Jieqiong Li, Guanli Xu, Wei Xiao
Summary: Layered Nb5+-doped LiNi0.83Co0.11Mn0.06O2 (NCM) oxide cathode materials were successfully synthesized through the introduction of Nb2O5 during the lithiation process. The Nb5+-doped samples demonstrated a perfect crystal structure with broader Li+ diffusion pathways and compact secondary particles packed by smaller primary particles. These Nb5+-doped samples exhibited excellent electrochemical properties, with NCM-1.0 showing optimal rate performance and cycling stability when 1.0 mol% of Nb2O5 was added. This Nb5+-doping strategy may provide an effective route for optimizing nickel-rich oxide cathode materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
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
Electrochemistry
Jinshang Song, Lingzhi Zhu, Yudong Li, Enshan Han, Qi Zhang, Gaojun Chen, Ziqiang Zhang, Xiaohui Yang, Yanzhen He
Summary: As one of the fastest-growing cathode materials, Nickel-rich layered cathode material has attracted attention due to its high specific energy, high operating potential, and long cycling life. However, it faces challenges in improving cycle stability and structural defects. This study synthesizes LiNi0.65-xCo0.15Mn0.20WxO2 (x = 0.5%, 1.0%, 2.0%) to investigate the advantages of eco-friendly and low-cost W doping cathode material on crystalline morphology and electrochemical properties. The results show that appropriate W doping significantly reduces particle size, improves stability, and enhances recycling performance. The detection of W in the lattice of crystal particles also increases lattice spacing and Li+ diffusion channels.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Gyeongbin Ko, Seongdeock Jeong, Sanghyuk Park, Jimin Lee, Seoa Kim, Youngjun Shin, Wooseok Kim, Kyungjung Kwon
Summary: Lithium-ion batteries (LIBs) are crucial for the electric vehicle (EV) industry, and LiNi1-x-yCoxMnyO2 (NCM) is the dominant cathode material used in EV LIBs. Due to the need for increased driving range, Ni content in NCM is maximized, but the resulting Ni-rich NCM is unstable. Doping with foreign elements has been explored as a strategy to overcome this instability, with over 46 elements considered and their effects on LIB performance investigated in numerous research articles. This comprehensive analysis of various doping elements and their impact on LIB performance provides valuable insights for the LIB industry and academia.
ENERGY STORAGE MATERIALS
(2023)