JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Ruirui Zhao,Jiaxing Liang,Jiajun Huang,Ruiyu Zeng,Jiafeng Zhang,Hongyu Chen,Guang Shi
Al 2 O 3 and AlPO 4 single-coated and double-coated LiNi 0.5 Co 0.2 Mn 0.3 O 2 materials have been synthesized by a wet-coating method in this paper. XRD , XPS , SEM, TEM, DSC as well as electrochemical methods are employed to investigate the structure, surface properties, thermal stability as well as electrochemical properties . The obtained layers are homogenously coated on the particles and the coating thickness is around 20–30 nm, the surface compositions are analyzed by XPS in detail as well. Comparing with those single-coated or uncoated samples, the double-coated one exhibits more superior thermal stability as well as electrochemical properties. The possible reason is mainly due to the dense and uniform coating layer as well as the formation of Li 3 PO 4 and LiAlO 2 on the cathode surface. Based on these results, it seems that Al 2 O 3 and AlPO 4 double-coating is an efficient strategy in improving the properties of LiNi 0.5 Co 0.2 Mn 0.3 O 2 materials, which can be also applied to other Ni-rich layered 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
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 31
·期 6
·2008044
·
IF 16.836
Xiaojuan Qian,Xiangqian Fan,Yaling Peng,Pan Xue,Chuang Sun,Xinlei Shi,Chao Lai,Jiajie Liang
The applications of lithium metal anode are limited by uncontrollable lithium dendrite growth and infinite volume changes during cycling. These fundamental issues are exacerbated at high cycling current densities and capacities. Herein, a mechanically stable and resilient lithium metal host is fabricated by covalently cross-linking a highly-conductive and lithiophilic MXene/silver nanowire scaffold through a silylation reaction between MXene nanosheets and polysiloxane. Compared with the control sample (an MXene scaffold assembled by weak van der Waals forces), the covalently cross-linked MXene scaffold displays excellent mechanical strength and resilience, which is conducive to buffer the large internal stress fluctuations generated during rapid and deep lithium plating-stripping and guaranteed that the integrated framework structure is maintained during long-term charging-discharging cycles. When used in a symmetric cell, the lithium composite anode based on the covalently cross-linked MXene host affords an unprecedented cyclic lithium plating-stripping stability of a record-high 3000 h lifespan at an ultrahigh current density (20 mA cm −2 ) and areal capacity (10 mAh cm −2 ). When this composite anode is coupled with a LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode, the full cell delivers an ultrahigh rate of 10 C for up to 1000 cycles, with an average capacity decay of 0.043% per cycle and a stable Coulombic efficiency of 98.7%.
研究领域:
材料科学
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电化学
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能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Science Advances
·
2022
·Vol. 8
·期 40
·
IF 14.957
Jing Xu,Yang Jin,Kai Liu,Nawei Lyu,Zili Zhang,Bin Sun,Qianzheng Jin,Hongfei Lu,Huajun Tian,Xin Guo,Devaraj Shanmukaraj,Hui Wu,Meicheng Li,Michel Armand,Guoxiu Wang
Recycling lithium from spent batteries is challenging because of problems with poor purity and contamination. Here, we propose a green and sustainable lithium recovery strategy for spent batteries containing LiFePO4, LiCoO2, and LiNi0.5Co0.2Mn0.3O2 electrodes. Our proposed configuration of “lithium-rich electrode || LLZTO@LiTFSI+P3HT || LiOH” system achieves double-side and roll-to-roll recycling of lithium-containing electrode without destroying its integrity. The LiTFSI+P3HT-modified LLZTO membrane also solves the H+/Li+ exchange problem and realizes a waterproof protection of bare LLZTO in the aqueous working environment. On the basis of these advantages, our system shows high Li selectivity (97%) and excellent Faradaic efficiency (≥97%), achieving high-purity (99%) LiOH along with the production of H2. The Li extraction processes for spent LiFePO4, LiNi0.5Co0.2Mn0.3O2, and LiCoO2 batteries is shown to be economically feasible. Therefore, this study provides a previously unexplored technology with low energy consumption as well as high economic and environmental benefits to realize sustainable lithium recycling from spent batteries.
研究领域:
材料科学
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环境科学
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可持续发展
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电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Ding Wang,Xinhai Li,Zhixing Wang,Huajun Guo,Yan Xu,Yulei Fan,Juanjian Ru
The severe capacity fading and poor rate performance under high voltage of LiNi 0.5 Co 0.2 Mn 0.3 O 2 are the vital barriers for their large scale application. In order to solve above issues, zirconium doped LiNi 0.5 Co 0.2 Mn 0.3 O 2 materials were prepared by solid state method. The effects of the zirconium content on the structure and electrochemical properties of Li(Ni 0.5 Co 0.2 Mn 0.3 ) 1- x Zr x O2 were extensively studied. Though the zirconium doped samples delivered lower initial capacities, the cycling stability are dramatically enhanced. Notably, Li(Ni 0.5 Co 0.2 Mn 0.3 ) 0.99 Zr 0.01 O 2 showed a capacity retention of 83.78% at 1C after 100 repeated cycle in a high voltage of 4.6 V, while that of bare sample remains only 69.35%. Moreover, the rate capability of Li(Ni 0.5 Co 0.2 Mn 0.3 ) 0.99 Zr 0.01 O 2 is also greatly reinforced especially at high current density . The improved electrochemical performances could be ascribed to the less cation mixing degree, better lithium transportation kinetic and lower impedance, which were confirmed by Rietveld refinement , X-ray photoelectron spectroscopy and electron impedance spectroscopy .
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DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 31
·17039-17047
·
IF 12.732
Fuxin Wei,Shufen Wu,Jiliang Zhang,Hongyang Fan,Liuyang Wang,Vincent Wing-hei Lau,Sizhou Hou,Minmin Zhang,Jiafeng Zhang,Bo Liang,Ruirui Zhao
Developing all solid-state lithium ion batteries (ASSBs) is a promising way to solve safety issues surrounding liquid-based batteries, yet the interfacial issues make ASSBs insufficient in providing long-term cycling performance or acceptable rate capabilities. Herein, we propose a new kind of electrolyte configuration, comprising a 3D ceramic framework filled with plastic crystals on the surface, to effectively enhance the interfacial Li diffusion kinetics. The soft plastic crystals enable not only excellent contact with the rigid framework and cathodes, but also rapid molecular reorganization to accommodate the interfacial Li, achieving ultrafast Li diffusion globally via the 3D framework. As a result, the ASSBs with the proposed electrolyte (i.e. garnet-succinonitrile composites) show an extremely low interfacial resistance, providing an initial discharge capacity of 165.3 mA h g−1 and a 95% capacity retention after 100 cycles when using a LiNi0.5Co0.2Mn0.3O2 (NCM) cathode. Furthermore, these NCM-ASSBs using the designed electrolyte even exhibit better cycling performance within a higher voltage range (2.8–4.5 V) than conventional lithium ion batteries (LIBs) using conventional liquid electrolytes (LEs). A capacity retention rate of 92% for 3DLLZO-PCE is demonstrated, against the 85% for LE-LIBs after 50 cycles. We believe that this strategy provides useful guidance for constructing high-performance ASSBs, which is important in their further commercialization.
研究领域:
材料科学
·
电化学
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电池技术
·
固态电解质
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Lixiong Bai,Wendong Xue,Haixia Qin,Yan Li,Yong Li,Jialin Sun
A dense LiCoO 2 microcrystalline buffer layer for an all-solid-state lithium battery is designed and prepared as a stable interface using a magnetron sputtering method. The LiCoO 2 microcrystalline buffer layer possesses a large interfacial specific surface area and excellent interfacial stability. The interfacial contact resistance of the modified interface is reduced by 1279 Ω compared to the unmodified interface. The mode of the structure of the modified interface is established by material studio, and the potential energy barrier is calculated by ab initio theory based on the structure model. The results show that the barrier to the migration of interfacial Li ion is only 0.097 eV, which is only 1/5 of that in the grain interior. The electrochemical performance is measured by using a cathode with a slurry mixture composed of LiNi 0.5 Co 0.2 Mn 0.3 O 2 and polymer electrolyte . The results show that the electrochemical properties of the all-solid-state lithium batteries are significantly improved by the addition of the LiCoO 2 microcrystalline layer, with the battery showing an initial discharge capacity of 149.5 mAh g −1 and a discharge capacity of 121.2 mAh g −1 after 50 cycles at 0.1 C and 60 °C.
研究领域:
材料科学
·
电化学
·
电池技术
·
固态电解质
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 46
·期 6
·7625-7633
·
IF 3.45
Yulin He,Ying Li,Nianchun Yao,Jiamei Li,Wenxian Li,Ziqiang Wang
A long-lived cycling property is an important factor for the extensive use of the lithium-ion batteries. In this study, a NaAlO 2 layer was initially coated on the LiNi 0.5 Co 0.2 Mn 0.3 O 2 surface. Electrochemical tests indicate that the coated surface achieves better cycling stability and a higher capacity at 25 °C. In addition, the 1 wt % NaAlO 2 -coated sample exhibits the best performance, and it also exhibits a discharge specific capacity of 189.6 mAh∙g −1 at 0.1C in the first cycle. After 800 cycles at 1C, the capacity retention of the 1 wt % NaAlO 2 -coated sample is approximately 73.31%, a value that is 21.26% higher than the pristine sample. The electrochemical impedance spectroscopy (EIS) analysis reveals a decrease in the LiNi 0.5 Co 0.2 Mn 0.3 O 2 charge transfer impedance and a significant increase in lithium ion diffusion after the application of the NaAlO 2 coating. The high ion diffusion coefficient and low charge transfer impedance are conducive to the better rate performance of NaAlO 2 -coated LiNi 0.5 Co 0.2 Mn 0.3 O 2 .
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 22
·11930-11939
·
IF 7.443
Shaojie Han,Yonggao Xia,Zhen Wei,Bao Qiu,Lingchao Pan,Qingwen Gu,Zhaoping Liu,Zhiyong Guo
The Li-rich layered oxides are attractive electrode materials due to their high reversible specific capacity (>250 mA h g−1); however, the origin of their abnormal capacity is still ambiguous. In order to elucidate this curious anomaly, we compare the lattice oxygen oxidation states among the Li-rich layered oxide Li1.14Ni0.136Co0.136Mn0.544O2, Li2MnO3 and LiNi0.5Co0.2Mn0.3O2, the two components in Li-rich layered oxides, and the most common layered oxide LiCoO2 before and after initial charge–discharge. For simplicity, we employ chemical treatments of NO2BF4 and LiI acetonitrile solutions to simulate the electrochemical delithiation and lithiation processes. X-ray photoelectron spectroscopy (XPS) studies reveal that part of lattice oxygen in Li1.14Ni0.136Co0.136Mn0.544O2 and Li2MnO3 undergoes a reversible redox process (possibly O2− ↔ O22−), while this does not occur in LiNi0.5Co0.2Mn0.3O2 and LiCoO2. This indicates that the extra capacity of Li-rich layered oxides can be attributed to the reversible redox processes of oxygen in the Li2MnO3 component. Thermogravimetric analysis (TGA) further suggests that the formed O22− species in the delithiated Li1.14Ni0.136Co0.136Mn0.544O2 can decompose into O2 at about 210 °C. This phenomenon demonstrates a competitive relationship between extra capacity and thermal stability, which presents a big challenge for the practical applications of these materials.
研究领域:
材料科学
·
电化学
·
储能
·
电池材料
·
固态化学
✓ 已验证
DOI
高影响因子
SusMat
·
2024
·
IF 18.7
Tianyi Wang,Yimeng Zhang,Xueyan Huang,Peifeng Su,Min Xiao,Shuanjin Wang,Sheng Huang,Dongmei Han,Yuezhong Meng
Practical high-voltage lithium metal batteries hold promise for high energy density applications, but face stability challenges in electrolytes for both 4 V-class cathodes and lithium anode. To address this, we delve into the positive impacts of two crucial moieties in electrolyte chemistry: fluorine atom (-F) and cyano group (-CN) on the electrochemical performance of polyether electrolytes and lithium metal batteries. Cyano-bearing polyether electrolytes possess strong solvation, accelerating Li + desolvation with minimal SEI impact. Fluorinated polyether electrolytes possess weak solvation, and stabilize the lithium anode via preferential decomposition of F-segment, exhibiting nearly 6000-h stable cycling of lithium symmetric cell. Furthermore, the electron-withdrawing properties of -F and -CN groups significantly bolster the high-voltage tolerance of copolymer electrolyte, extending its operational range up to 5 V. This advancement enables the development of 4 V-class lithium metal batteries compatible with various cathodes, including 4.45 V LiCoO 2 , 4.5 V LiNi 0.8 Co 0.1 Mn 0.1 O 2 , and 4.2 V LiNi 0.5 Co 0.2 Mn 0.3 O 2 . These findings provide insights into design principles centered around polymer components for high-performance polymer electrolytes.
研究领域:
材料科学
·
电化学
·
电池技术
·
聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Zhaofeng Zhuang,Junfeng Li,Haocheng Ji,Zhihong Piao,Xinru Wu,Guanjun Ji,Song Liu,Jun Ma,Di Tang,Nengzhan Zheng,Junxiong Wang,Guangmin Zhou
The direct recycling of cathode materials in lithium-ion batteries is important for environmental protection and resource conservation. The key regeneration processes are composition replenishment and atom rearrangement, both of which depend on the migration and diffusion of atoms. However, for the direct recycling of degraded LiNi 0.5 Co 0.2 Mn 0.3 O 2 (D-NCM523) cathode, the irreversible phase transitions that accumulate during the long-term cycles block the Li diffusion channels with a high diffusion energy barrier, making it difficult to fully repair the layered structure and resulting in rapid capacity decay. To address the challenge, fast Li replenishment channels are rebuilt to regulate the surface phase and effectively assist the regeneration process with a reduced energy barrier. This method reduces the amount of Li supplement by >75% and shortens the sintering time (only 2 h) to fully regenerate D-NCM523, compared to general direct recycling methods. The regenerated NCM523 (LCMB-NCM523) exhibits a satisfactory repaired specific capacity of 160 mAh g −1 and excellent cycling stability, retaining 78% of its capacity after 300 cycles. In addition, LCMB-NCM523 is recycled with improved thermal decomposition peak temperature and enables 200 cycles even at 60 °C, greatly improving safety. This work proposes a promising way for the large-scale direct regeneration of layered cathodes.
研究领域:
材料科学
·
电池技术
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 14
·9307-9318
·
IF 12.732
Tianle Zheng,Jianwei Xiong,Bingying Zhu,Xiaotang Shi,Ya-Jun Cheng,Hongbin Zhao,Yonggao Xia
Lithium secondary batteries (LSBs) have witnessed explosive growth in the last decade. A wide operating temperature window is crucial for practical applications. A new concept is developed to expand the temperature window between −20 °C and 150 °C, where a competitive decomposition process between the electrolyte and solvent is manipulated with adiponitrile (ADN) over a wide temperature range. The decomposition of ethylene carbonate (EC) solvent and anions of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and lithium oxalyldifluoroborate (LiODFB) is regulated with ADN via a temperature-dependent lithium solvation mechanism. As a result, a SEI layer with a rich inorganic component is formed at elevated temperatures, leading to improved performance in lithium titanate (LTO)/Li, lithium iron phosphate (LFP)/Li, and LiNi0.5Co0.2Mn0.3O2 (NCM523)/Li batteries over a wide temperature range. It enables a coulombic efficiency (CE) of 97.39% at 100 °C and more than 100 hours of cycling of Li/Li batteries at 150 °C, as well as stable cycling of LFP/Li batteries in the temperature range between 120 °C and −20 °C. Stable cycling performance is demonstrated with the LTO/Li batteries over a wider temperature range from −40 °C to 150 °C. High-temperature electrochemical stability is exhibited at 5C, with a capacity retention ratio of 87.94% at 120 °C and 99.93% at 100 °C after 1000 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Yang Chen,Yin Zhang,Jianda Niu,Hongli Xu,Zhixian Dong,Jinbao Xu,Caihong Lei
Considering the lower room temperature ionic conductivity, Li-ion transference number, and narrow electrochemical stability window in all-solid-state polymer electrolytes (ASSPEs)-based lithium metal batteries (LMBs), it is of particular necessity to find plausible strategies to accomplish these issues. In this paper, poly(ε-caprolactone-co-1,5-dioxepan-2-one) (PDCL)-based poly(ether-ester) ASSPEs have been successfully fabricated by the random ring-opening polymerization of cyclic CL and DXO. The PDCL-SPE exhibits a high ion conductivity of 3.54 × 10–5 S cm–1 at 30 °C with a high Li-ion transference number (0.62) and a superior electrochemical stability (5.1 V). FT-IR spectra confirm the synergistic effect of ether and carbonyl of ester from the main chain of PDCL, which is superior to the dissociation of lithium salts and facilitation the motivation of lithium ions. Furthermore, the assembled LiFePO4/PDCL-SPE/Li batteries displayed low interfacial resistance, Li dendrite suppression, high specific capacity, and excellent cyclic performance (capacity retention of 85% after 200 cycles at 0.1 C). The high-voltage LiNi0.5Co0.2Mn0.3O2/PDCL-SPE/Li batteries also exhibits good cycling performance and durability.
研究领域:
材料科学
·
电化学
·
能源存储
·
电池技术
✓ 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）