Article
Engineering, Environmental
Xiangyun Li, Fengyin Zhou, Shuaibo Gao, Jingjing Zhao, Dihua Wang, Huayi Yin
Summary: This study proposes a low-temperature roasting method assisted by NaOH for recycling spent LiFePO4, achieving efficient Li recovery and purity improvement at lower temperatures with reduced energy consumption and greenhouse gas emissions.
Article
Materials Science, Multidisciplinary
Hui Dang, Zhidong Chang, Hualei Zhou, Sihang Ma, Min Li, Jialing Xiang
Summary: In this study, K2CO3/Na2CO3 was used as a roasting agent to extract lithium from pyrometallurgical slag of spent lithium-ion batteries. The results showed that the eutectic molten salt system could be formed at 720 degrees C, and the lithium extraction efficiency reached 93.87% under the optimal conditions.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Energy & Fuels
Longjiao Chang, Shiyuan Cao, Shaohua Luo, Fusheng Zhang, Kun Li
Summary: The LNMO cathode material was prepared through a two-stage roasting process, with X-ray diffraction and SEM analysis indicating good photocatalytic properties and stable charge-discharge capacity. The research shows that the material exhibits good battery performance under certain temperature and rate conditions.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Engineering, Environmental
Min Li, Xianxian Zhou, Xiaotao Ma, Liang Chen, Ding Zhang, Shoudong Xu, Donghong Duan, Chengmeng Chen, Qinbo Yuan, Shibin Liu
Summary: The newly designed NG/CNTs-SO3- three-dimensional electrode effectively improves the performance of lithium-sulfur batteries by enhancing cycling stability and rate capability through the formation of a continuous ion-electronic conductive network and accelerating redox reaction kinetics.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Xueyan Li, Zhiyuan Zhang, Lili Gong, Zhuojun Zhang, Guandong Liu, Peng Tan
Summary: Research shows that lithium-ion batteries, especially those with silicon-based anodes, undergo significant volume changes during charge and discharge. This contradicts the expected decrease in stress as the battery volume decreases. By combining experimental measurements and an improved single-particle model, this study reveals that the large volume change of the anode material and the limited diffusion of lithium-ion in the active particles result in uneven concentration distribution and anomalous stress changes. The rupture of particles during cycling also contributes to increased diffusion channels and diffusion coefficient, enabling the prediction of battery health and reducing prediction complexity.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Nan Piao, Peng-Fei Wang, Long Chen, Tao Deng, Xiulin Fan, Li Wang, Xiangming He
Summary: This study reports a nonflammable all-fluorinated electrolyte that can support high-rate and inherent-safe 3.2V LNMO/LTO batteries. The nanoscale fluorinated interphase stabilizes the cathodic structure and suppresses side reactions during cycling, even at a high cutoff voltage of 5.0V. The LNMO/LTO cells in the all-fluorinated electrolyte exhibit excellent cyclability and wide temperature tolerance.
Article
Chemistry, Physical
Hanwu Luo, Haipeng Shi, Yang Cao, Yuting Yin, Yi-Hu Feng, Xin-Yu Fan, Peng-Fei Wang, Xiaogang Han
Summary: In this study, a design scheme for high-energy cathode materials for Li-ion batteries is proposed. By constructing a hierarchical structure with different chemical compositions from the bulk to the surface, the issue of capacity decay and short cycle life in high-voltage cycling of cathode materials is addressed. The introduction of Cr3+ in the inner end suppresses the dissolution of Mn3+ and partial Mn2+ to improve bulk stability. The construction of an undoped shell eliminates the catalytic effect of dopants on interfacial side reactions, enhancing interfacial stability.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Energy & Fuels
Wei Yang, Longjiao Chang, Shaohua Luo, Xiaolong Bi, Shiyuan Cao, Anlu Wei, Jianan Liu, Fusheng Zhang
Summary: This article investigates the effects of annealing treatment on the properties of spinel LiNi0.5Mn1.5O4 cathode material, and proposes that annealing at 600 degrees C for 8 hours is the most effective method to improve the material's performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Kanglong Guo, Chunlei Zhu, Huaping Wang, Shihan Qi, Junda Huang, Daxiong Wu, Jianmin Ma
Summary: Increasing the cut-off voltage of cathodes improves the energy density of Li||LiCoO2 batteries, but also leads to rapid battery degradation due to oxidation and deterioration. However, by using bis-(benzenesulfonyl)imide (BBSI) as an additive, a uniform and highly Li+ conductive cathode electrolyte interphase (CEI) is constructed, which stabilizes the batteries at 4.6 cut-off voltage and exhibits superior cycling and high-rate performance. The CEI, consisting of LiF and conductive Li+ moieties, improves Li+ migration, alleviates cathode degradation, and reduces other secondary degradation factors. Li||LiCoO2 batteries with 1% BBSI-containing electrolyte sustain 81.30% of initial capacity after 300 cycles at 0.5C, and 88.27% of initial capacity even after 500 cycles at 2C/3C.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Jinkun Wang, Yun Gao, Jianhong Liu, Li Wang, Hong Xu, Yang Yang, Huaihe Song, Bo Zhang, Xiangming He
Summary: In this study, Li-rich Li2.24SrTi6-xZrxO14 materials with different Zr doping amounts were synthesized and the effect of Zr4+ doping on the properties of Li2.24SrTi6O14 was investigated. The results show that Zr4+ doping can effectively inhibit grain growth, improve the diffusion coefficient of Li+ in the material, and enhance high-rate charge-discharge performance. The optimal doping ratio is x = 0.1, with a capacity retention of 82.9% at 10C/1C. Excessive Zr4+ doping is harmful to the capacity and rate performance of the anode.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Hanwu Luo, Siqing Qi, Xin-Yu Fan, Fang-Di Ji, Yi-Hu Feng, Duo Si, Da-Wei Wang, Mengting Liu, Xiaogang Han, Peng-Fei Wang
Summary: By incorporating cobalt into the lattice of LiNi0.5Mn1.5O4 cathode, the diffusion properties of lithium ions are improved, electronic conductivity is enhanced, and dissolution of manganese is prevented, leading to improved performance of lithium-ion batteries at low temperatures. This research not only contributes to enhancing the electrochemical performance of 5 V-based cathode materials, but also provides useful guidance for their commercial applications at low temperature.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Environmental
Fanjun Kong, Guikai Zhang, Dajun Wu, Fei Sun, Shi Tao, Shengqi Chu, Bin Qian, Wangsheng Chu, Li Song
Summary: This study investigates the structural change of high-voltage spinel LiNi0.5Mn1.5O4 (LNMO) cathodes under a wide voltage range. It reveals a complex phase transformation process during deep discharge, resulting in structural distortion and capacity fading. These findings provide valuable insights into the performance degradation mechanism of spinel cathodes, contributing to the design of high-performance cathode materials for advanced lithium-ion batteries.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Barsa Chang, Dae Hui Yun, Insu Hwang, Joon Kyo Seo, Joonhee Kang, Gyeongho Noh, Sunghun Choi, Jang Wook Choi
Summary: The high-voltage operation of the LNMO cathode material in lithium-ion batteries is hindered by interfacial degradation caused by electrolyte decomposition. In this study, a sacrificial binder, CRN, is incorporated into the LNMO electrode to overcome this challenge and significantly improve its cycling and rate performance.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Zitong Fei, Yongyou Su, Yunchun Zha, Xiaohui Zhao, Qi Meng, Peng Dong, Yingjie Zhang
Summary: The efficient recovery of lithium from spent lithium-ion batteries has become a focus due to the shortage and high price of lithium resources, which hinders the sustainable development of the lithium-ion battery industry. A novel selective lithium extraction process using low-valent salts assisted roasting and washing is proposed, achieving closed-loop recycling of spent cathode materials. The process shows a high leaching rate of lithium (99.39%) under optimized conditions, and the regenerated LiCoO2 materials exhibit excellent structure and electrochemical performance. The economic and environmental benefits of this process support practical industrial innovation and recycling of spent lithium-ion batteries.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Ceramics
Aijia Wei, Jinping Mu, Rui He, Xue Bai, Zhan Liu, Lihui Zhang, Yanji Wang, Zhenfa Liu
Summary: Boron doping enhances the electronic conductivity of LiNi0.5Mn1.5O4 materials, increases the cationic disorder degree, and promotes kinetic charge transfer, thereby improving the electrochemical performance.
CERAMICS INTERNATIONAL
(2021)
