JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Tao Tao,Chao Chen,Wen Qi,Bo Liang,Yingbang Yao,Sheng-Guo Lu
An antimony doped tin oxide (ATO) coating is formed to improve the structural stability, electrochemical performance and thermal stability of LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) cathode materials . It was observed that the 0.5 wt.% ATO-coated NCM523 cathode exhibited a capacity retention of 80.0% after 50 cycles at 1 C between 2.5 and 4.5 V, while that of the pristine one was only 70.4%. The rate capability of the coated cathode was also better than that of the pristine NCM523 in a voltage range of 2.8–4.5 V at various C-rates. The capacity retention was about 11.5% higher than that of the pristine NCM523, when the current rate is set as 5 C. Results indicate that the ATO coating is a promising approach for improving the electrochemical performance of NCM523 cathode materials.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Dong-yan Liu,Shi-neng Sun,Duan-yang Li
The recycling of cathode materials for spent NCM has always been a major concern for the energy industry. However, among the current processing methods, the general leaching efficiency of Li is between 85% and 93%, with much room for improvement. The recovery of Ni, Co and Mn requires a high cost of secondary purification. In this study, to recycle the NCM cathode material, a route of sulphated reduction roasting – selective Li water leaching – efficiency acid leaching of Ni, Co, Mn – extraction separation – crystallisation was adopted. The results showed that after roasting (a temperature of 800 °C, a reaction time of 90 min, a carbon content of 26%, and a sulphuric acid addition of nH2SO4:nLi = 0.85), Li water leaching efficiency was 98.6%, followed by acid leaching of Ni, Co and Mn at around 99%. Mn, Co were extracted with Di-(2-ethylhexyl) phosphoric acid and 2-Ethylhexyl phosphonic acid mono-2-ethylhexyl ester respectively to obtain Ni, Co, Mn solutions, which eventually were crystallized for manganese sulphate, cobalt sulphate, lithium carbonate and nickel sulphate products, with high purity of 99.40%, 98.95%, 99.10%, and 99.95%. The results of this study improved the leaching efficiency of Li and were closely linked to the actual industrial preparation of Ni, Co and Mn sulphates, providing a feasible and promising basis for spent NCM cathode materials industrial recovery.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Batteries-Basel
·
2025
·Vol. 11
·期 11
·418
·
IF 4.8
Lang Xu,Zhipeng Wang,Ya Li,Jie Ding,Xiang Li,Ziqian Wang,Mingjiao Wu,Qiujian Zhang,Mingwu Xiang,Wei Bai,Fangkun Li,Yongshun Liang
Copper (Cu) doping is recognized as an effective strategy to enhance the electrochemical properties of LiNi1−x−yCoxMnyO2(NCM) cathode materials. However, the influence of Cu2+doping on particle size and grain boundary fusion remains insufficiently explored. A simple microwave-assisted solution combustion synthesis method was used to introduce Cu2+into LiNi0.5Co0.2Mn0.3O2(NCM523), aiming to regulate particle size and grain boundary fusion. The results demonstrate that increasing the Cu2+doping content promotes particle growth, while an appropriate doping level reduces the degree of grain boundary fusion and cation mixing. Benefiting from these structural improvements, the optimized LiNi0.5Co0.2Mn0.29Cu0.01O2(Cu–1) cathode exhibits significantly enhanced electrochemical performance, delivering a discharge capacity of 128.6 mAh g−1after 100 cycles at 0.2 C, which is 32 mAh g−1higher than value of the undoped sample (96.6 mAh g−1). These findings underscore that tailored Cu2+doping can effectively optimize the microstructure of NCM523, leading to superior cycling stability, and provide new insights into the design of high-performance NCM cathodes.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Huangjie Yang,Yuhao Sun,Junfeng He,Jing Li,Jianbin Li,Zhengping Ding,Yurong Ren
Due to the increasing number of spent lithium batteries (LIBs), it is imperative to recycle spent LIBs to reduce environmental pollution and raw material consumption . Here, we present a novel deep eutectic solvent (DES) composed of guanidine hydrochloride with formic acid for spent LIBs the recycling to achieve rapid and efficient leaching of cathode materials from spent LIBs and synthesis of high-quality cathode material precursors in the DES leach solution . The multifaceted characterisation of the DES leach solution has revealed the mechanisms of the novel DES leached cathode materials. Under the optimal leaching conditions, the leaching rates of Li, Ni, Co, and Mn have been explored to be 99.79 %, 98.86 %, 99.51 %, and 96.12 %, respectively. More importantly, the DES leach solution addition of oxalic acid solution can be used to synthesise the precursor and to produce LiNi 0.5 Co 0.2 Mn 0.3 O 2 with the recovered Li 2 CO 3 . Electrochemical test shows that the initial discharge specific capacity of regenerated LiNi 0.5 Co 0.2 Mn 0.3 O 2 has 162.72 mAh g −1 , which is as good as that of commercial LiNi 0.5 Co 0.2 Mn 0.3 O 2 . The entire study accomplishes the regeneration of DES, and highly efficient recovery and regeneration of cathode materials from spent LIBs. This research provides a valuable alternate treatment for various DES leach cathode materials and an efficient new method for recycling spent LIBs cathode materials.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Boyu Liu,Tengfei Wang,Qing Pang,Jun Yang,Haidong Liu,Hongyu Wang
To improve the energy density of s ingle-crystal LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NMC523) by increasing the charging cut-off voltage presents a big challenge since the material degrades significantly at high voltage (>4.3V). A simple method to enhance the high-voltage electrochemical properties of single-crystal NMC523 was proposed by introducing a mesoporous TiO 2 coating and Ti doping. The specific discharge capacity for the modified NCM523-M-TiO 2 -0.5 sample achieves 182.81 mAh g −1 at a 0.1 C rate within the 3.0–4.5 V range. Furthermore, the capacity retention rate was 80.69 % after 200 cycles at a charge/discharge rate of 1 C, significantly higher than that of bare NCM523, which exhibited values of 181.36 mAh g −1 and 46.40 %. In detail, the mesoporous TiO 2 coating shields the cathode from the electrolyte, enhancing the stability at the interface and promoting the movement of lithium ions. Additionally, Ti doping increases lattice spacing and stabilizes the layered structure. This research will inform the design of high-performance cathode materials for Li-ion batteries.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Yongxiang Chen,Yunjiao Li,Wei Li,Guolin Cao,Shuyun Tang,Qianye Su,Shiyi Deng,Jia Guo
The stabilities of the host and interfacial structure for layered LiNi x Co y Mn 1-x-y O 2 cathode materials are critical for their electrochemical properties, especially at high voltage. This study reports the synergetic effect of the Zr and Ti elements on the LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode material (NCM523). The as-obtained Zr/Ti modified LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode material shows the excellent electrochemical performance at high voltage. It delivers 167.3 mAh·g −1 at 1 C over 3.0–4.4 V corresponding 94.20% capacity retention after 200 cycles. Moreover, the rate capability of Zr/Ti co-modified NCM523 at 16 C (3.0–4.4 V) rises to 139.4 mAh·g −1 and corresponding capacity retention (vs. 0.5 C) is 79.57%. In addition, its capacity retention reaches to 91.71% after 100 cycles at 1 C rate even at 3.0–4.6 V. Such superior electrochemical performances are ascribed to the Zr doping and Ti modification. The synergetic modifications of the Zr/Ti elements not only stabilize the crystal structure, but also absorb the lithium residues to form mixed Li 4 Ti 5 O 12 /Li 2 TiO 3 coating layers, which strengthen the stability of the interfacial structure and the kinetic characteristics of the cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Guolin Cao,Zhuomin Jin,Jie Zhu,Yunjiao Li,Bin Xu,Yike Xiong,Jiachao Yang
Poor cycling and rate performance are considered one of the greatest obstacles to the large-scale commercialisation of Ni-rich layered cathode material , especially at high cut-off voltages. In this study, we successfully prepared amorphous Al 2 O 3 -coated LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) cathode material by the straightforward carboxymethyl cellulose (CMC)-assisted wet chemical method . As the cathode material for lithium-ion batteries, the amorphous Al 2 O 3 -coated NCM523 maintains capacity retention of 86.30% in the range of 3.0–4.6 V after 100 cycles at 1C and 86.57% at 8C after 50 cycles, which is higher than that of pristine NCM523 under the same conditions (76.40% and 63.20%, respectively). The uniform Al 2 O 3 coating layer greatly inhibits transition metal dissolution on the surface of NCM523 cathode materials at high cut-off voltage. In addition, the structural damage of the NCM523 cathode is effectively retarded due to the consumption of HF by Al 2 O 3 . This work will provide inspiration for the design of new methods for the commercialisation of Ni-rich layered cathode material.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2018
·Vol. 2
·期 7
·1481-1490
·
IF 0
Rong Zhou,Jianxing Huang,Shaobo Lai,Jiyang Li,Feng Wang,Zhiqiang Chen,Weiqing Lin,Chao Li,Jing Wang,Jinbao Zhao
A novel strategy for selecting an additive based on understanding the influence of different functional groups on electrochemical characteristics is adopted. N,N-Diethylamino trimethylsilane (DEATMS) is tested as a bifunctional electrolyte additive to scavenge H2O and neutralize HF in the electrolyte and enhance the behaviour of graphite/LiNi0.5Co0.2Mn0.3O2 cells operating at a high voltage (4.5 V vs. Li/Li+) or elevated temperature (55 °C). With 2% DEATMS, no LiPF6 hydrolysis species is found after storage at 55 °C for 6 days, even with a moisture content of 2000 ppm in the electrolyte. In addition, the graphite/LiNi0.5Co0.2Mn0.3O2 cells containing DEATMS show cycling performances superior to those of the cells without DEATMS upon cycling for 100 cycles at a high voltage (85.5% vs. 72.0%) or high temperature (81.2% vs. 70.6%). The sacrificial oxidation of DEATMS on the cathode surface restricts direct contact between the electrolyte and cathode, improving the electrochemical performance. The ex situ surface analysis of the electrodes after cycling indicates that both the electrolyte decomposition and Mn dissolution are inhibited by the deposition of DEATMS oxidation products.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
Surfaces and Interfaces
·
2025
·
IF 6.3
Mihong Cao,Lucheng Li,Wenfeng Yuan,Jun Chen
In order to solve the problems of insufficient adsorption electrolyte capacity and small specific surface area caused by the smooth surface and few pores of Super P spherical conductive particles, this work uses concentrated sulfuric acid (H 2 SO 4 ) for surface etching of Super P conductive particles to explore the influence of different etching time on the micromorphology of SP conductive agent and the behaviors of LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM-523) batteries. After etched by concentrated H 2 SO 4 , the surface of SP conductive agent changes from “capillary” structure to fluffy “plush” structure, effectively improving the conductivity specific surface area of the conductive agent particles. Compared with the pristne SP-0H conductive agent, the batteries using 1.5% of concentrated H 2 SO 4 etched SP-1H, SP-2H and SP-20H conductive agent have smaller EIS impedance value, larger area of CV curves, and smaller potential difference of the redox peaks. As a result, the initial charging/discharging capacities of SP-1H, SP-2H and SP-20H conductive batteries were 178.7/183.0, 187.6/183.9, 178.9/180.8 mAh/g with corresponding ICE of 102.4%, 98.0% and 101.1% respectively, which were much higher than the pristine SP-0H conductive battery (182.0/173.7 mAh/g with ICE of 95.4%). In addition, the SP-1H, SP-2H and SP-20H batteries also show significantly improved cycle performance and rate cycle capabilities, showing more superior comprehensive behaviors, which can provide a new modification insights for the exploration of new conductive agent in NCM-523 of high-performance lithium ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Chengjin Liu,Chang Miao,Manyi He,Jiale Wang,Qiyan Chen,Shuqing Nie,Wei Xiao
LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) powders modified with fast ion conductor Li 3 InCl 6 (LIC) are fabricated via sol-gel and sintering processes, and the LIC layer with a thickness of about 2.4842 nm is uniformly covered on the surface to fabricate the targeted LIC@NCM523-2 composite powders , in which the LIC layer not only lowers the residual lithium content but also decreases the cation mixing degree. The LIC@NCM523-2 electrode preserves relatively intact morphology and layered structure after cycles. Moreover, the LIC@NCM523-2 electrode delivers discharge specific capacity of 130.5 mAh g −1 with capacity retention ratio of 76.8% after 200 cycles at 1.0 C and 25 °C, and retains about 108.8 mAh g −1 at the 200th cycle at 1.0 C and 60 °C. Importantly, the LIC@NCM523-2 electrode exhibits desirable discharge specific capacity of 128.2 mAh g −1 at 5.0 C and easily returns back to 164.3 mAh g −1 at 0.1 C and 25 °C. Those outstanding electrochemical properties are ascribed to the fact that the appropriate thickness LIC layer protects active particles from the corrosion of liquid electrolytes to stabilize the internal structure and provides high conductivity to facilitate Li + ions transport, elucidating the importance of the surface modified strategy with the fast ion conductor LIC layer.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2023
·
IF 8.6
Yaqi Chen,Xieyu Xu,Jianli Cheng,Xuyang Wang,Dawei Wang,Yongjing Wang,XingXing Jiao,Jian Chen,Shizhao Xiong,Zhongxiao Song,Yangyang Liu
All-solid-sate batteries (ASSBs) with a NASICON-type solid-state electrolyte (SSE) of Li1.3Al0.3Ti1.7(PO4)3 (LATP) can be accepted as a promising candidate to significantly improve safety and energy density due to their high oxidation potential and high ionic conductivity. However, thermodynamic instability between the cathode and LATP is scarcely investigated during cosintering preparation for the integrated configuration of ASSBs. Herein, the structural compatibility between commercially layered LiNi0.5Co0.2Mn0.3O2 (NCM523) and LATP SSE was systematically investigated by cosintering at 600 °C. It is noticeable that an extreme side reaction between Li from NCM523 and phosphate from LATP happens during its cosintering process, leading to a severe phase transition from a layered to a spinel structure with high Li/Ni mixing. Consequently, the capacity of NCM523 is lost during the preparation of the NCM523–LATP composite cathode. Based on this, we suggested that the interface modification of the NCM523/LATP interface is valued significantly to inhibit this extreme side reaction, quickening the application of LATP-based ASSBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Xiaobo Jia,Mo Yan,Ziyou Zhou,Xianglei Chen,Chao Yao,De Li,Daming Chen,Yong Chen
Layered Nd-doped LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) compounds were successfully synthesized via a coprecipitation-assisted solid-phase method in this work. The effects of Nd doping on the crystal structure, morphology, and electrochemical properties were characterized thoroughly using XRD, SEM, TEM, EDX, and electrochemical tests. Rietveld refinement of the X-ray diffraction data indicated that the Nd-doped samples had lower cation mixing than the raw NCM523. The SEM and EDX mapping characterization results demonstrated that Nd atoms were uniformly distributed in NCM523. At 1C and 10C, the Li(Ni 0.5 Co 0.2 Mn 0.3 ) 0.992 Nd 0.008 O 2 materials exhibited initial discharge capacities of 189.7 and 101.5 mAh g −1 , respectively, with capacity retentions of 83.3% and 88%, respectively, compared to those of NCM523 (68.1% and 52.5%, respectively) with a cutoff voltage of 4.8 V after 100 cycles. It was found that NCM523 doped with Nd 3+ ions can expand lithium ion diffusion channels in the layered structure and stabilize the structure of the material.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）