Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 8
·4494-4504
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IF 11.301
Song-Yi Liao,Xing-Wen Huang,Qiu-Shi Rao,Yue-Zhu Li,Jun-Qi Hu,Feng Zheng,Zhi-Yuan Ma,Ting-Ting Cui,Yi-Dong Liu,Yong-Gang Min
LiNi0.8Co0.1Mn0.1O2 (NCM811) has attracted increasing attention owing to its extremely high discharge capacity (>200 mA h g−1). However, poor mechanical strength, cycling stability, and rate capability impose limitations on its large-scale practical applications. Here, we report that few-layer and rod-like MXene (Ti2C3Tx) as a multifunctional additive significantly enhances the mechanical property, cycling performance, and rate capability of the Li/NCM811 cells. Thus, NCM811 added with 2.5 wt% MXene (2.5-MXene) delivers the highest discharge capacity of 209 mA h g−1 at 0.2C as well as the best rate performance with a high reversible capacity of 95 mA h g−1 at 8C. Moreover, the capacity retention of 2.5-MXene can reach 77.0% after 100 cycles at a 0.5C rate, while it is only 53.6% for pristine NCM811 without MXene (0-MXene). Such superior performances result from the effective and multifunctional MXene additive, which is helpful to establish a better conductive network, store/release Li+via cation intercalation, offer more deformation space, form a physical protection CEI layer, and suppress the M ↔ H2 phase transformation for the NCM811 electrodes. In addition, the DFT calculation indicates that the MXene additive can prohibit the irreversible Ni/Co/Mn elements' migration via the absorption process. Therefore, the few-layer/rod-like MXene can be a facile and efficient approach to enhance the mechanical and electrochemical performance of the NCM811 materials for large-scale applications in the next-generation energy density lithium-ion batteries by considering its multifunctional properties, low cost, and convenient accessibility.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
DOI
高影响因子
Materials Today
·
2025
·
IF 22
Hong Zhang,Ao Zeng,Zhigang Zhang,Hua He,Yanwu Zhai,Tao He,Zhenbang Xu,Yoshihiro Kuroiwa,Sangwook Kim,Enyue Zhao,Xiaoling Xiao
High-voltage Ni-rich cathodes, which show high energy density and large cost-effectiveness, hold great promise for power Li-ion batteries. However, the unstable cyclic structure rooted in stress restricts their practical applications. In this work, we propose a strategy using a dispersed Eu 2 O 3 buffer phase to mitigate the high-voltage cyclic stress . The optimized Ni-rich cathode shows excellent high-voltage thermal stability and practical long-term cycling stability. For the constructed 4.6 V full cell, a superior capacity retention of 92 % after 200 cycles is observed. The enhanced cyclic properties are ascribed to the mitigated stress, as revealed by multi-characterizations such as in-situ X-ray diffractions and finite element simulation. As expected, the mitigated stress well stabilizes the oxygen lattice and preserves the particle structures. More importantly, the approach is confirmed to be versatile in other high-voltage cathodes. Also, other available elements including La and Dy for the construction of buffer phases are outlooked.
研究领域:
材料科学
·
电化学
·
锂离子电池
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能源存储
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固态化学
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纳米材料
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结构稳定性
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 10
·2192
·
IF 3.426
Qiu-Shi Rao,Song-Yi Liao,Xing-Wen Huang,Yue-Zhu Li,Yi-Dong Liu,Yong-Gang Min
In this work, a few-layer MXene is prepared and sprinkled on a commercial polypropylene (PP) separator by a facile spraying method to enhance the electrochemistry of the Ni-rich LiNi0.8Co0.1Mn0.1O2(NCM811) cathode. Scanning electron microscope (SEM) and X-ray diffraction (XRD) are used to characterize the morphology and structure of MXene. Fourier transform infrared spectroscopy (FT-IR) and a contact angle tester are used to measure the bond structure and surface wettability PP and MXene/PP separator. The effect of the MXene/PP separator on the electrochemical performance of ternary NCM811 material is tested by an electrochemical workstation. The results show that the two-dimensional MXene material could improve the wettability of the separator to the electrolyte and greatly enhance the electrochemical properties of the NCM811 cathode. During 0.5 C current density cycling, the Li/NCM811 cell with MXene/PP separator remains at 166.2 mAh/g after the 100 cycles with ~90.7% retention. The Rctof MXene/PP cell is measured to be ~28.0 Ω. Combining all analyses results related to MXene/PP separator, the strategy by spraying the MXene on commercial PP is considered as a simple, convenient, and effective way to improve the electrochemical performance of the Ni-rich NCM811 cathode and it is expected to achieve large-scale in high-performance lithium-ion batteries in the near future.Keywords:polypropylene composite membrane;MXene;Ni-rich LiNi0.8Co0.1Mn0.1O2;electrochemical performance
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiaoli Peng,Hongmei Shen,Kai Su,Wenjie Wang,Shijie Weng,Chenxia Tang,Zhiyu Xue,Yong Xiang
Ternary nickel-rich layered oxide LiNi0.8Co0.1Mn0.1O2 (NCM811) is recognized as a cathode material with a promising future, attributed to its high energy density. However, the pulverization of cathode particles, structural collapse, and electrolyte decomposition are closely associated with the fragile cathode–electrolyte interphases (CEI), which seriously affect the electrochemical performances of ternary high-nickel materials. In this paper, fluorine- and nitrogen-containing methyl-2-nitro-4-(trifluoromethyl)benzoate (MNTB) was selected, which was synergistically regulated with fluoroethylene carbonate (FEC) to generate a robust CEI film. The preferential decomposition of MNTB/FEC results in the formation of an inorganic-rich (Li3N, LiF, and Li2O) CEI film with uniformly dense and stable characteristics, which is conducive to the migration of Li+ and the stability of the NCM811 structure and enhances the cycling stability of the battery system. Simultaneously, MNTB effectively suppresses the adverse reaction associated with increased polarization caused by higher interface impedance due to conventional single FEC additives, further improving the rate capability of the battery. Moreover, MNTB/FEC can effectively eliminate HF, preventing its corrosion on the NCM811 cathode. Under the synergistic effect of MNTB/FEC, after 300 discharge cycles at a high cutoff voltage of 4.3 V and a current density of 1 C (2 mA cm–2), the discharge capacity of the NCM811||Li battery was 150.12 mA h g–1 with a capacity retention of 81.10%, while it was only 32.8% for the standard electrolyte (STD). The discharged capacity of the MNTB/FEC-containing battery was about 115.43 mA h g–1 at the high rate of 7 C, which was considerably higher than that of the STD (93.34 mA h g–1). In this study, the designed MNTB as a novel solvent synergistically regulated with FEC will contribute to the enhanced stability of NCM811 materials at high cutoff voltages and at the same time provide an effective modified strategy to enhance the stability of commercial electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Materials Express
·
2019
·Vol. 9
·期 8
·895-905
·
IF 1.465
Yu Juan,Huang Wenlong,Meng Bicheng,Wang Lejie,Zhao Junkai,Li Linbo,Du Xiaoqing,Fang Zhao
Sodium ions have been successfully doped into LiNi0.8Co0.1Mn0.1O2 (NCM811) by solid phase method. The influences of Na doping on the electrochemical properties of the electrode at high current intensities were studied. The experimental results
show that 3% Na modified LiNi0.8Co0.1Mn0.1O2 has superior rate performance and cycling behavior due to the cation mixing is suppressed and the structural stability is enhanced by Na doping. The capacity retention of Li0.97Na0.03Ni0.8Co0.1Mn0.1O2
is 64.33% after 100th cycles at 10 C (1 C = 200 mA · g–1) in the potential range from 2.8 V to 4.3 V, which is greatly higher than the pristine NCM (only 35.01%). Li0.97Na0.03Ni0.8Co0.1Mn0.1O2 also shows
excellent rate performance of 140.5 mAh · g–1 at 10 C, and the discharge capacity of 3% Na-NCM is higher than that of the pristine NCM when the current intensity is returned from 10 C to 0.5 C. The analysis of the cyclic voltammetry (CV) and electrochemical impedance
spectroscopy (EIS) measurements confirm that the Na doping plays an important role in inhibiting the electrochemical polarization of LiNi0.8Co0.1Mn0.1O2 and improving the diffusion of lithium ions.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jie Zhu,Guolin Cao,Yunjiao Li,Shilei Wang,Shiyi Deng,Jia Guo,Yongxiang Chen,Tongxing Lei,Jinping Zhang,Shenghong Chang
The transition metals in ternary oxide cathode materials for lithium-ion batteries inevitably exchange with protons in LiPF 6 -containing electrolytes to be dissolved, leading to loss of the active material and rapid capacity fading. Here, a chemically inert Nd 2 O 3 interlayer is employed to avoid the direct contact of the active material (LiNi 0.8 Co 0.1 Mn 0.1 O 2 ) and electrolyte. As a result, Nd 2 O 3 -coated LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) shows improved cycle performances with a capacity retention of 88.0% after 100 cycles over 3.0–4.4 V, 9.3% higher than the retention of the bare NCM811. Even at an elevated temperature, Nd 2 O 3 -coated NCM811 exhibits better cycle performance as well. The superior electrochemical performances for Nd 2 O 3 -coated NCM811 are ascribed to that Nd 2 O 3 encapsulation-assisted surface passivation alleviates the undesirable interface side reactions and transition metal dissolution (TMD). These features suggest the promising potential of chemically inert Nd 2 O 3 as a long-acting surface modifier in passivating electrolyte/electrode interface.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
X. Dong,L. Dou,A. Tang,P. Hu,Z. Zhang,C. Shang
LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811), as a promising Ni-rich electrode material for lithium-ion batteries, is hindered by the interface instability and structure degradation caused by electrolyte erosion during operation. In this work, with the addition of thiophene into traditional electrolyte, the elastic conductive polythiophene (PTh) is in-situ electrochemically polymerized on the surface of NCM811 to stabilize the interface and hinder electrolyte corrosion. As expected, the PTh-modified NCM811 shows improved cycling stability at 2 C with capacity retention of 94% after 200 cycles and considerable rate capability with high specific capacity of 171.7 mAh/g at 5 C. This work provides an effective and feasible method to employ conductive polymer as elastic protective layer for electrode 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
Materials
·
2023
·Vol. 16
·期 10
·3613
·
IF 3.4
Fu Long,Yuyang Liu,Guobin Zhu,Yan Wang,Honghe Zheng
The application of nickel-rich cathodes in lithium-ion batteries has been hampered by its rapid capacity/voltage fading and limited performance of rate. In this work, a passivation technique is used to create a stable composite interface on single-crystal LiNi0.8Co0.1Mn0.1O2(NCM811) surface, which greatly improves the cycle life-span and high-voltage constancy of cathode with 4.5 and 4.6 V cut-off voltage. The improved Li+conductivity of the interface enables a firm cathode–electrolyte interphase (CEI), which reduces interfacial side reactions, lowers the risk of safety hazards, and improves irreversible phase transitions. As a result, the electrochemical performance of single-crystal Ni-rich cathode are remarkably enhanced. The specific capacity of 152 mAh g−1can be delivered at a charging/discharging rate of 5 C under 4.5 V cut-off voltage, much higher than 115 mAh g−1of the pristine NCM811. After 200 cycles at 1 C, the composite interface modified NCM811 demonstrates outstanding capacity retention of 85.4% and 83.8% at 4.5 V and 4.6 V cut-off voltage, respectively.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Separations
·
2026
·Vol. 13
·期 9
·239
·
IF 3.5
Zhengwu Peng,Ruili Zheng,Xiangyu Wang,Zhen Wan,Xiaolin Pan,Zhi Wang,Zongliang Zhang,Dong Wang,Guoyu Qian
The increasing generation of spent Ni-rich layered cathodes creates an urgent demand for efficient lithium recovery and value-added reutilisation of transition-metal components. An MnSO4·H2O-assisted rapid thermal reconstruction route coupled with water leaching was developed for selective lithium recovery from spent NCM811 cathodes. At an MnSO4·H2O-to-NCM811 mass ratio of 0.9:1, an applied current of 30 A, and a treatment duration of 20 s, the layered structure was converted into water-soluble lithium sulfates and transition-metal-rich oxides. Water leaching at 20 °C for 20 min achieved a stage lithium-leaching recovery of 99.12%, with limited dissolution of Ni, Co, and Mn. The combined aqueous stream contained 0.42 g L−1Li. After concentration and CO2carbonation, Li2CO3was obtained with a precipitation efficiency of 90.6% and a purity of 99.52 wt.%, corresponding to an overall lithium recovery of 88.7%. Elemental-balance closures were 98.6–99.6% for Li, Ni, Co, Mn, and S. The regenerated cathode LiNi0.54Co0.07Mn0.39O2delivered 95.2 mAh g−1after 150 cycles at 0.2 C. These results demonstrate integrated lithium recovery and transition-metal reutilisation from spent Ni-rich cathodes.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Sen Jiang,Xin Xu,Junying Yin,Haihua Wu,Xuequan Zhu,Hongtao Guan,Lai Wei,Kang Xi,Yuelang Lan,Linghao Zhang,Yang Qiu,Yunfang Gao
Li metal batteries (LMBs) coupled with Ni-rich materials are promising candidates for next-generation high-energy-density lithium batteries. However, due to the inferior stability of cathode/solid-electrolyte interphases (CEI/SEI) and aggressive chemistry of Ni-rich cathode materials, Li metal anode (LMA) and LiPF 6 -based carbonate electrolytes pose a threat to the achievement of high-energy-density LMBs. Herein, 1-(trimethylsilyloxy)cyclohexene (TMSCH) with functional groups (C=C, Si-O) as a novel multi-functional electrolyte additive is employed to regular the CEI/SEI films on the both Ni-rich cathode materials (LiNi 0.8 Co 0.1 Mn 0.1 O 2 , NCM811) and LMA surface, and scavenge detrimental hydrogen fluoride (HF) to enhance electrochemical performances of the Li/NCM811 batteries. Furthermore, the theoretical calculation, electrochemical measurements and physical characterizations demonstrate the feasibility and effectiveness of the strategy. Specially, the TMSCH-derived SEI film exhibits a hierarchical structure consisting of an organic-rich outer layer and a LiF-rich inner layer. Accordingly, the microcracks generation of NCM811 secondary particles, transition metal ions dissolution, lithium dendrite growth, parasitic reactions and HF generation of electrolyte are effectively addressed. As a result, with existence of the TMSCH additive, the capacity retention of Li/NCM811 batteries at 1C are remarkably enhanced from 68.2% to 84.9% at 30 °C and 64.2% to 85.8% at 45 °C. Furthermore, the Li/Li symmetric cells with TMSCH can stably cycle over 1000 h at 0.2 mA cm −2 and exhibit super-low overpotential of 75 mV at 1 mA cm −2 .
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 Energy Materials
·
2023
·
IF 6.4
Changfei Zou,Zihao Zang,Xiyuan Tao,Lingguang Yi,Xiaoyi Chen,Xiaoyan Zhang,Li Yang,Xianhu Liu,Xianyou Wang
All-solid-state lithium batteries (ASSLBs) composed of sulfide-based solid-state electrolyte and LiNixMnyCo1–x–yO2 (NMC) cathode are expected to become the promising next generation of energy storage systems due to their great potential in highly improved safety and energy density. However, the poor interfacial stability between the NMC cathode and sulfide-based electrolyte remains an important challenge for the commercialization of ASSLBs. In this study, a thin layer of fast lithium-ion conductor Li1.3Al0.3Ti1.7(PO4)3 (LATP) with a thickness of 8 nm was coated at the interface between LiNi0.8Co0.1Mn0.1O2 (NCM811) and Li5.5PS4.5Cl1.5 via a facile wet chemical method to improve interfacial stability. It has been found that the nanoscale LATP coating layer can not only accelerate lithium ions across the NCM811/Li5.5PS4.5Cl1.5 interface but also effectively alleviate the interfacial problems. The initial discharge capacity of the as-prepared LATP@NCM811/Li5.5PS4.5Cl1.5/Li batteries at 0.1 C is 151.5 mAh/g, and the capacity retention rate is 81.6% after 100 cycles at room temperature. The results indicate that interfacial modification with the nanosized LATP coating is an effective strategy for providing more possibilities for commercial application of ASSLBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 4
Peng Hao,Liu Lin,Zhang Qiao,Liu Shuhao,Lin Man,Li Hao,Deng Yonghong,Jiao Chuanlai,Wang Chaoyang,Xu Hongli
High-voltage LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathodes are critical for enhancing the energy density of lithium-ion batteries (LIBs). The development of binders compatible with high-voltage NCM811 cathode materials is crucial to enhance the electrochemical performance of LIBs. However, the traditional fluoropolymer binder, poly(vinylidene difluoride) (PVDF), can potentially leach components or break down into poly(fluoroalkyl substances) (PFAS) chemicals, thereby contributing to PFAS contamination. A novel fluorine-free polymer, polysulfone-polyamide-polyimide (SPIO), was designed and synthesized as a binder for NCM811 cathodes. The SPIO binder exhibits exceptional mechanical properties and superior electrochemical characteristics. The cathode film fabricated with SPIO demonstrated a remarkable delamination force of 8 N (390 N·m −1 ), indicating robust adhesion. The Li∥NCM811 cell incorporating the SPIO binder retained 80% of its initial capacity after 300 cycles at a current density of 0.2 C. In comparison, the control cells assembled with the PVDF binder retained only 52% of their capacities under the same cycling conditions. Furthermore, the SPIO binder exhibited improved compatibility with the electrolyte. Transmission electron microscopy analysis of the cathode films after 100 cycles revealed the formation of a uniform, dense, and continuous chemical-electrochemical interface (CEI) by the SPIO binder on the surface of the NCM811 particles, which significantly contributed to the enhancement of the electrochemical performance. These results highlight the potential of SPIO as an advanced binder material for high-performance lithium-ion batteries.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 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）