LANGMUIR
·
2024
·
IF 3.7
Qiaoyun Wu,Zhuijun Xu,Ying Yu,Meilan Peng,Jie Gao,Lei Nie,Ya-Jun Cheng,Peter Müller-Buschbaum,Yonggao Xia
Nickel-rich layered oxide cathodes, such as LiNi0.5Co0.2Mn0.3O2 (NCM523), are prevalent in high-power batteries owing to their high energy density. However, these cathodes suffer from undesirable side reactions occurring at the cathode/liquid electrolyte interface, leading to inferior interface stability and poor cycle life. To address these issues, herein, an amphiphilic diblock copolymer poly(dimethylsiloxane)-block-poly(acrylic acid) (PDMS-b-PAA) along with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) is utilized for modifying the electrode surface. This modification causes a thin and stable cathode–electrolyte interface (CEI) on the surface of NCM523 particles, as evidenced by XPS, TEM, and EIS analysis. The introduction of this modified interface successfully suppresses the capacity fading of NCM523. After 200 cycles at a rate of 1.0 C, the capacity of the modified NCM523 cathode is 108.7 mAh g–1, with a capacity retention of 82.8%, while the control samples without the polymer modification display a capacity retention of 72.7%. These results outline the distinct advantage of electrode surface modification with diblock copolymers/LiTFSI for the stabilization of Ni-rich layered oxide cathodes.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Qin Gu,Ming Wang,Yang Liu,Yunlong Deng,Liping Wang,Jian Gao
The overcharge safety performance of lithium-ion batteries has been the major bottleneck in the widespread deployment of this promising technology. Pushing the limitations further may jeopardize cell safety when it is performed at high-temperature storage. On the basis of the lacking systematic research on overcharge protection electrolyte additives with high-temperature storage capacity, we explore the promotion effect of overcharge additives on electrolyte decomposition at 60 °C. Specifically, the addition of tris(trimethylsily) phosphite (TMSP) and lithium difluoro(oxalato)borate (LiDFOB) in the electrolyte can not only form the robust cathode electrolyte interface/solid electrolyte interphase (CEI/SEI) but also improve the thermal stability of the electrolyte. Therefore, we promote the electrolyte system to realize the 18,650 LIB storage at 60 °C for 50 days by optimizing the formula in the electrolyte containing biphenyl (BP) and cyclohexylbenzene (CHB) overcharge protection additives, and the capacity retention rate can reach more than 90% with overcharge safety. Further, the optimized electrolyte system has also been implemented to commercial 18,650 LIBs and demonstrates the widening of the route to the widespread application of the electrolyte under extreme conditions.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
PubMed
高影响因子
Batteries-Basel
·
2024
·Vol. 10
·期 6
·179
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IF 4.6
Hui Wang,Zejia Wu,Mengmeng Wang,Ya-Jun Cheng,Jie Gao,Yonggao Xia
With the rapid development of new energy vehicles and energy storage industries, the demand for lithium-ion batteries has surged, and the number of spent LIBs has also increased. Therefore, a new method for lithium selective extraction from spent lithium-ion battery cathode materials is proposed, aiming at more efficient recovery of valuable metals. The acid + oxidant leaching system was proposed for spent ternary positive electrode materials, which can achieve the selective and efficient extraction of lithium. In this study, 0.1 mol L−1H2SO4and 0.2 mol L−1(NH4)2S2O8were used as leaching acid and oxidant. The leaching efficiencies of Li, Ni, Co, and Mn were 98.7, 30, 3.5, and 0.1%, respectively. The lithium solution was obtained by adjusting the pH of the solution. Thermodynamic and kinetic studies of the lithium leaching process revealed that the apparent activation energy of the lithium leaching process is 46 kJ mol−1and the rate step is the chemical reaction process. The leaching residue can be used as a ternary precursor to prepare regenerated positive electrode materials by solid-phase sintering. Electrochemical tests of the regenerated material proved that the material has good electrochemical properties. The highest discharge capacity exceeds 150 mAh g−1at 0.2 C, and the capacity retention rate after 100 cycles exceeds 90%. The proposed new method can extract lithium from the ternary material with high selectivity and high efficiency, reducing its loss in the lengthy process. Lithium replenishment of the delithiation material can also restore its activity and realize the comprehensive utilization of elements such as nickel, cobalt, and manganese. The method combines the lithium recovery process and the material preparation process, simplifying the process and saving costs, thus providing new ideas for future method development.
研究领域:
材料科学
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环境工程
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能源技术
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Xiang Li,Ya Li,Lang Xu,Jie Ding,Mingjiao Wu,Ziqian Wang,Zhipeng Wang,Wei Bai,Fangkun Li,Mingwu Xiang
Single-crystal-like LiNi x Co y Mn 1-x-y O 2 (SCL-NCM) has attracted considerable attention as a promising cathode material owing to its excellent structural stability, but conventional routes often require complex processing and yield large particles (≥1 μm) that limit Li + transport. Herein, a series of submicron-scale single-crystal-like LiNi 0.5 Co 0.2 Mn 0.3 O 2 (SCL-NCM523) materials with particle sizes of 100–400 nm were synthesized using a microwave-assisted flameless liquid-phase combustion method. The effect of secondary calcination temperature on their structural evolution and electrochemical performance was systematically investigated. The optimized SCL-NCM523–2 sample obtained at 800 °C exhibits single-crystal-like features, an average particle size of approximately 204 nm, and relatively low Li + /Ni 2+ cation mixing. These structural advantages contribute to improved structural stability, reduced polarization, and favorable Li + transport kinetics, enabling SCL-NCM523–2 to deliver a high initial discharge capacity of 147.6 mAh g −1 and maintain 87.2% capacity retention after 100 cycles at 1.0C. In addition, when paired with a Si C anode, the SCL-NCM523–2 // Si C full cell delivers a capacity retention of 91.2% after 100 cycles at 1.0C within the voltage range of 2.8–4.3 V. This study provides a low-temperature route for preparing submicron SCL-NCM523.
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产品关联
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
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2016
·
IF 7.145
Guorong Hu,Manfang Zhang,Lili Wu,Zhongdong Peng,Ke Du,Yanbing Cao
A facile solution route was employed for the preparation of an Al doped ZnO (AZO) coating layer, which was composed of many AZO nanoparticles. These nanoparticles have an average particle size of 50 nm and have been successfully decorated on the surface of NCM523. As cathode material for lithium ion batteries, the AZO-decorated NCM523 exhibits superior lithium storage improvements according to good cyclic performance, enhanced rate performance (134.2 mAhg–1 after 200 cycles at 10 C), and high-temperature performance (148.9 mAhg–1 at 10 C at 60 °C). Such significant improvement could be attributed to the structural superiority of the AZO decoration on the surface of NCM523, which would stabilize the surface structure of the bulk, suppress the undesirable side reaction at the interface of the electrodes, and lead to the enhancement of the conductivity. The preparation of AZO-decorated NCM523 provides an effective method for the high-performance lithium ion batteries and has a certain reference for other materials.
研究领域:
材料科学
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能源存储技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Hao Chen,Li Xiao,Han Chen,Yirong Zhu,Kaixiong Xiang,Haiyang Liao
Residual Li on surface of spherical particles of LiNi 0·5 Co 0·2 Mn 0·3 O 2 (NCM523) was used to synthesise the core-shell structure of Li 3 PO 4 @ NCM523 for enhancing structural stability and long-cycle life. The optimal mass ratio (Li 3 PO 4 :NCM523) was found to be 0.5 wt% (LPO-0.5), and the thickness of Li 3 PO 4 on the surface of LPO-0.5 was approximately 12 nm. Compared with the pristine NCM523, the Li 3 PO 4 @ NCM523 cathode material not only has a longer cycle life, but also exhibits better structural stability. The Li 3 PO 4 layer inhibits the electrolyte from eroding the NCM523 cathode material and prevents the volume loss of the active microsphere during cycling. Furthermore, the core-shell structure of material observed via scanning electron microscopy was well maintained after 200 cycles. These results verify that the core-shell structure of material contributes to the improvement of Ni-based cathode structural stability and that the simple process favours the industrial application.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 45
·期 4
·6041-6053
·
IF 3.741
Yanfang Xie,Fuzhong Wu,Xinyi Dai,Yi Mai,Yijing Gu,Huixin Jin,Junqi Li
Summary Nickel-cobalt-manganese ternary cathode materials are known as one of the most promising future cathode materials for Li-ion batteries (LIBs) due to their high discharge capacity, environmental friendliness, and low cost. In this paper, submicron LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) primary particles with good crystallinity and dispersibility have been synthesized combine a coprecipitation method used ethanol as solvent with solid-phase sintering technology. A feeding strategy through separate dropping of sodium carbonate and ammonia is adopted; the structure and properties of NCM523 under different pH conditions are investigated. It is found that the NCM523 synthesized at pH = 8 (NCM523-8) exhibits a uniform particle size of about 300 nm, with good crystallinity. The NCM523-8 exhibits an excellent high-potential cycling performance, with an initial discharge capacity of 193.6 mAh g −1 at 0.2 C in the voltage of 3.0 to 4.5 V, and the capacity retention is 91% after 100 cycles. It also shows excellent rate performance with a reversible capacity of 130 mAh g −1 at 5 C. The superior high-potential electrochemical performance is attributed to the improved lithium-ion diffusion coefficient and stabilized structure by the special structural characteristics as evidenced by cyclic voltammetry, electrochemical impedance spectroscopy, and X-ray diffraction.
研究领域:
材料科学
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电化学
✓ 已验证
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
ACS Applied Energy Materials
·
2023
·
IF 6.4
Juan Guo,Jianhui Li,Ziqiang Fan,Jingwei Qiu,Haiping Ye,Junfeng Liang,Jiaying Liang,Ronghua Zeng,Yuepeng Cai
Cathode interphase plays an important role in suppressing parasitic electrode reactions for high-voltage batteries, which highly depends on interphase chemistry. In this work, we report a rational design of cathode interphase chemistry by applying an electrolyte additive, tri-tert-butyl borate (TTBB). As demonstrated in a nickel-rich layered oxide (LiNi0.5Co0.2Mn0.3O2, NCM523)/Li/graphite pouch cell in standard electrolyte (STD, 1 M LiPF6 in the solvents of ethylene carbonate (EC)/ethyl methyl carbonate (EMC) = 3/7 (weight ratio)) without and with TTBBunder 4.5 V, the capacity retention of the cell after 550 cycles under 1C at 25 °C is enhanced from 33.5 to 87.4% and its capacity at 5C is improved from 430.3 mAh to 483.7 mAh by the introduction of TTBB. TTBB shows good performance even under harsh environments such as high temperature (45 °C), the presence of HF, and low temperature (−20 °C). Thanks to the preferential oxidation of TTBB compared with carbonate electrolyte, a thin and well-defined cathode interphase is constructed with an inner layer mainly composed of B–F species (C8H18BO2F) and an outer layer mainly composed of B–O species (C11H21BO6), which is the result of the lower binding energy of B–F species with active oxygen on the NCM523 surface (−50.2 kJ mol–1) than that of B–O species (−30.7 kJ mol–1). Additionally, these species possess high electronic insulation and excellent Li+-ion-transfer property, resulting in chemical stability and low impedance of the cathode interphase. This work emphasizes the significance of cathode interphase chemistry and provides a practical strategy for the performance improvement of various high-voltage 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
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Guiyan Sun,Shaobo Lai,Xiangbang Kong,Zhiqiang Chen,Kun Li,Rong Zhou,Jing Wang,Jinbao Zhao
A blend cathode has been prepared by mixing both LiNi0.5Co0.2Mn0.3O2 (NCM523) of high energy density and high specific capacity and LiFe0.15Mn0.85PO4/C (LFMP/C) of excellent thermal stability via a low-speed ball-milling method. The lithium ion batteries using the blend cathode with LFMP/C of optimum percent exhibit better capacity retention after 100 cycles than those using only single NCM523 or LFMP/C. Both theoretical simulation and experimental rate performances demonstrate that the electrochemical property of blend cathode materials is predictable and economical. In addition, the thermal behaviors of blend cathodes are studied by using differential scanning calorimetry analysis. The thermal stability of blend cathode materials behaves better than that of the bare NCM523 accompanied with an electrolyte. It is found that the outstanding rate and thermal performance of the blend cathode is due to the prominent synergistic effect between NCM523 and LFMP/C, and 10% LFMP/C in the blend cathode materials is the most adaptable as considering both electrochemical and thermal properties simultaneously.
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
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固态化学
·
热分析
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 44
·34915-34934
·
IF 4.4
Hu Yiting,Liu Zhixiong,Liu Bei,Zou Qiuling,Li Fei,Xiang Yanhong,Liu YanHong
This study aimed to develop a dual-functional one-pot strategy for spent LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) cathode scraps by integrating selective lithium recovery with the in-situ conversion of residual transition metals into value-added functional materials. A sodium persulfate (SPS)-assisted reaction system was constructed, and methylene blue (MB) was selected as a model organic pollutant to evaluate the photocatalytic performance of the converted products. The effects of calcination pretreatment, SPS dosage and initial pH were optimized, while reactive species and degradation pathways were investigated through mechanistic analysis and LC-MS/MS. Under the optimized conditions of calcination at 420 °C, SPS dosage of 1.0 g/L and initial pH 7.0, the lithium leaching efficiency reached 97.38%, lithium selectivity over co-leached Ni, Co and Mn reached 79.90%, and MB degradation efficiency in the one-pot system reached 91.50%. The delithiated residue was directly transformed into a ternary mixed-phase catalyst containing NiO, CoO and MnO 2 /MnO x , which achieved 98.29% MB degradation in an independent SPS-activation photocatalytic system. Mechanistic results indicated that photogenerated holes and multivalent Ni/Co/Mn redox cycles promoted the formation of singlet oxygen and superoxide radicals. Overall, this integrated route enables efficient lithium recovery, high-value utilization of residual metals and pollutant degradation, providing a promising waste-to-resource strategy for spent LIB cathode recycling and environmental remediation. Graphical abstract
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DOI
高影响因子
危险品化学品经营许可证（带存储）