Energy Storage Materials
·
2021
·
IF 17.789
Yu Wu,Xuning Feng,Xiang Liu,Xuefeng Wang,Dongsheng Ren,Li Wang,Min Yang,Yongling Wang,Weifeng Zhang,Yalun Li,Yuejiu Zheng,Languang Lu,Xuebing Han,Gui-Liang Xu,Yang Ren,Zonghai Chen,Jitao Chen,Xiangming He,Khalil Amine,Minggao Ouyang
There is an urgent need for high-safety and high-energy lithium-ion batteries to satisfy the rapidly increasing need for energy storage. Nickel-rich layered cathodes have been at the forefront of the revolution for batteries due to their relatively high capacity and low cost. However, with the increase of nickel content, the batteries suffer from severe safety concerns, which caused by thermal runaway. Here we show that the ultraconformal cathode-electrolyte interphase (CEI) protective skin with high inorganic content dramatically enhances the safety of high-energy practical Li-ion pouch cells. We find that the robust CEI skin significantly improves the intrinsic thermal stability, mitigates the evolution of oxygen resulting from phase transition, and effectively suppresses the associated parasitic reactions between the delithiated cathodes and electrolyte. The in-situ CEI engineering strategy is simple and suitable for practical industrial manufacture, and it provides design ideas for aggressive nickel-rich cathodes towards safe and high-energy batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Xiang Zhou,Dingding Zhu,Yong Su,Feixiang Wu,Xiaolei Ren,Xuedong Zhang,Xiangze Ou,Yaling Rao,Long Xie,Liang Tang,Jianyu Huang,Qiao Huang
Metal fluorides (MFs) are regarded as high-capacity conversion cathode materials for next-generation lithium-ion batteries with high energy density. However, these cathodes suffer from poor electronic conductivity, sluggish reaction kinetics, and deleterious cathode solid electrolyte interface (CEI) formation, which may cause rapid cell degradation upon cycling. Herein, a low temperature chemical vapor deposition (CVD) carbon coating technology is successfully achieved to coat MFs-FeF 2 with a thin amorphous carbon layer, which promotes the formation of a stable CEI with improved electronic and ionic transport property. Consequently, a discharge capacity higher than 450 mAh g −1 of the CVD coated FeF 2 is achieved with a capacity retention at about 75% after 2500 cycles in a saturated electrolyte. Moreover, an unprecedented cycling performance with the discharge capacity of 350 mAh g −1 after 500 cycles in a super diluted electrolyte is also achieved. Advanced cryo-electron microscopy reveals that the carbon coating significantly suppresses the undesirable CEI formation and promotes the formation of a thin CEI with excellent chemo-mechanical property. This work provides a feasible technology to stabilize the important interface on MFs and offers a new strategy to accelerate the commercial adoption of such cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Rongrong Guo,Xiaoyun Xu,Songmei Li,Yangyang Cheng,Junwei An,Mei Yu,Jinyan Zhong,Juan Du,Shubin Yang,Bin Li
Lithium bis((trifluoromethyl)sulfonyl)azanide (LiTFSI) based electrolytes have become the preferred electrolytes for lithium metal batteries (LMBs) due to their exceptional anode stability and ionic conductivity. However, challenges including unstable cathode electrolyte interface (CEI) formation and aluminum current collector (AlCC) corrosion have hindered the application of LiTFSI-based electrolyte in high-voltage LMBs. In this work, a universal passivation strategy is proposed and achieved with additive 8-hydroxyquinoline (8-HQ) in LiTFSI based electrolyte (ED-HQ). The 8-HQ additive preferentially decomposes on the cathode surface to generate Li 3 N, inducing the formation of inorganic-rich CEI with a uniform thickness of only 10 nm. The dense and homogeneous inorganic-rich CEI enables the cycling stability of the cathode. Meanwhile, the 8-HQ additive shows strong adsorption on the AlCC surface, which promotes the formation of a composite passivation layer consisting of an Aluminum-8-hydroxyquinoline (Alq 3 ) chelate layer and an AlF 3 /LiF inorganic layer, increasing the stable operating voltage of AlCC to 4.9 V and reducing the corrosion current density to one tenth. As a result, the joint effects enable Li||LiFePO 4 cells with ED-HQ electrolyte to achieve 89.8% capacity retention after 500 cycles at an elevated cutoff voltage of 4.5 V, demonstrating a viable pathway toward stable high-voltage LMB operation.
研究领域:
电化学
·
储能
·
材料科学
·
电池技术
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Fangfang Shang,Hengdao Quan,Xiaoxun Ma
In this study, 3-trifluoromethylpyrazole (TMPZ) was developed as a multifunctional electrolyte additive to enhance wettability between separator and electrolyte, CEI formation and remove HF to improve the performance of Li/NCM622 batteries by experiment and theoretical calculation. After 200 cycles at 30 °C, the discharge capacity retention of batteries at 1 C with 0.5 wt% TMPZ additive is remarkably enhanced from 68.3 % to 83.2 %. The enhanced electrochemical performance of the batteries by adding TMPZ additive is evaluated by the spectroscopic characterization and theoretical calculation. It is demonstrated that TMPZ can generate uniform and dense CEI film via ring-opening electrochemical polymerization of TMPZ on the NCM622 electrode surface. The CEI film helps to suppress the breakdown of LiPF 6 electrolyte and the leaching of transition metals, effectively avoiding harmful side reactions between the NCM622 electrode and the electrolyte. Furthermore, introducing TMPZ can enhance the wettability between separator and electrolyte, therefore providing more channels of Li + to accelerate reaction kinetics of 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
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yunchao Liao,Na Wang,Xinyi Dai,Wenwen Zhou,Fuzhong Wu,Jiexi Wang,Haijun Chen,Yi Mai
Ultrahigh-nickel LiNi x Co y Mn 1-x-y O 2 cathode material (Ni content ≥ 0.9) is of great significance for the development of high energy density of lithium-ion batteries. However, its high surface activity leads to more surface residual lithium formation and deterioration of electrochemical performance, especially at high voltage. Here we add NH 4 F and nitrogen-doped carbon nanotubes (CNT) during the dimethyl carbonate (DMC) washing process, and constructed in situ the nano-LiF and CNT composite cathode electrolyte interphase (CEI) layer while removing part of residual lithium, effectively optimizing the surface environment of LiNi 0.9 Co 0.05 Mn 0.05 O 2 . The modified LiNi 0.9 Co 0.05 Mn 0.05 O 2 has a capacity retention rate of 61.3 % after 200 cycles between 2.8 and 4.5 V at 1C, significantly higher than the 46.7 % of the unwashed sample, and a specific discharge capacity of 146.9 mAh g −1 at 5C, compared to 127.5 mAh g −1 for the unwashed sample. Benefit from the alleviation of polarization and the increase of Li + diffusion coefficient, the stable CEI layer provides effective protection for LiNi 0.9 Co 0.05 Mn 0.05 O 2 under 4.5 V, alleviating surface side reactions. In this paper, a simple and effective strategy is developed to optimize the surface of Ni-rich cathode material, which provides a new insight for the treatment of surface residual lithium.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-16
·
IF 4.011
An Fuqiang,Zhao Hongliang,Zhou Weinan,Ma Yonghong,Li Ping
Recently, high-energy density cells containing nickel-rich cathodes and silicon-based anodes have become a practical solution for increasing the driving range of electric vehicles. However, their long-term durability and storage performance is comparatively poor because of the unstable cathode-electrolyte-interphase (CEI) of the high-reactivity cathode and the continuous solid-electrolyte-interphase (SEI) growth. In this work, we study several electrolyte systems consisting of various additives, such as S-containing (1,3,2-dioxathiolane 2,2-dioxide (DTD), DTD + prop-1-ene-1,3-sultone (PES), methylene methanedisulfonate (MMDS)) and Si-containing (tris(trimethylsilyl) phosphate (TTSP) and tris(trimethylsilyl) borate (TMSB)) compounds, in comparison to the baseline electrolyte (BL = 1.0 M LiPF 6 + 3:5:2 w-w:w EC: EMC: DEC + 0.5 wt% lithium difluoro(oxalato)borate (LiDFOB) + 2 wt% lithium bis(fluorosulfonyl)imide (LiFSI) + 2 wt% fluoroethylene carbonate (FEC) + 1 wt% 1,3-propane sultone (PS)). Generally, electrolytes with Si-containing additives, particularly BL + 0.5% TTSP, show a lower impedance increase in the full cell, better beginning-of-life (BOL) performance, less reversible capacity loss through long-term cycles and better storage at elevated temperatures than do electrolytes with S-containing additives. On the contrary, electrolytes with S-containing additives exhibit the advantage of low SEI impedance but yield a worse performance in the full cell than do those with Si-containing additives. The difference between two types of additives is attributed to the distinct function of the electrodes, which is characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS), which was performed on full cells and half cells with fresh and harvested electrodes.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Matter
·
2024
·
IF 17.3
Xun Guo,Hu Hong,Qing Li,Jiaxiong Zhu,Zhuoxi Wu,Yanbo Wang,Shuo Yang,Zhaodong Huang,Yan Huang,Nan Li,Chunyi Zhi
Rechargeable zinc metal batteries (ZMBs) are promising for fabricating low-cost, safe, and high-energy-density storage systems. However, ZMBs typically undergo interfacial side reactions and cathode dissolution during cycling, resulting in the depletion of active materials and performance decay of batteries. Here, we develop a localized high-concentration fluorinated electrolyte featuring a high fluorine/oxygen atomic ratio (388.72%) with beneficial solvation chemistry, fostering the simultaneous formation of a cathode-electrolyte interphase (CEI) enriched with C–F bonds and a ZnF 2 -dominant solid-electrolyte interphase (SEI). The constructed robust electrode-electrolyte interfaces (EEIs) contribute to dendrite-free zinc deposition and a highly stable cathode, demonstrating soft-packed Zn||Mn-doped V 2 O 5 batteries with an exceptional energy density (91.25 Wh kg −1 cathode+anode ) and capacity retention (90.5%) over 500 cycles employing a limited zinc supply. The anode-free ZMBs deliver a record power density of 153.9 Wh kg −1 cathode+anode with a high capacity retention of 80.2% over 1,500 cycles. This research provides significant insights for interface construction in multivalent 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
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zerui Chen,Yingxinjie Wang,Jie Wang,Xiaohui Li,Guohao Li,Ziying Zhang,Zhenjun Wu,Xiuqiang Xie,Nan Zhang
Manganese-based Prussian blue analogues (PBA) have garnered widespread attention as the promising cathode materials for sodium-ion batteries. However, the inevitable Jahn-Teller distortion and the formation of unstable and uneven cathode electrolyte interphase (CEI) result in severe Mn dissolution and poor cycling stability. Herein, we report a simple MXene modification strategy cold pressing method to embed Prussian blue cathode materials into MXene nanosheets. This highly conductive protective barrier not only mitigates the Jahn-Teller distortion in Mn-PBA and maintains the integrity of the particles during charge–discharge cycles, but also partially suppresses side reactions between the electrolyte and cathode interface through surface functional groups (−F), resulting in a thin and uniform CEI. The protection of the stable CEI and MXene nanosheets simultaneously alleviate the Jahn-Teller effect and suppress the Mn dissolution during long cycling, thus allowing the cathode material to retain ∼ 80 % of its capacity after 1000 cycles at a current density of 1000 mA g −1 . This study highlights the importance of stabilizing the cathode interface and provides a novel approach for preparing highly stable manganese-based PBA cathode.
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
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Jinping Mu,Aijia Wei,Xiaohui Li,Rui He,Lijing Sun,Peizhao Liu,Xue Bai,Lihui Zhang,Xi Zhang,Zhenfa Liu,Jing Gao
Tris (trimethylsilyl) phosphate (TMSP) and tris(2,2,2-trifluoroethyl) phosphate (TTFP) was added to carbonate solvent-based electrolytes as dual-additives to enhance the performance of LiNi 0·5 Mn 1·5 O 4 (LNMO). The X-ray photoelectron spectroscopy results revealed that both TMSP with high oxidation ability and TTFP with high oxidation resistance participated in the formation of cathode–electrolyte interphase (CEI) films. Electrochemical impedance spectroscopy confirmed that the constructed CEI films had excellent electronic insulation and ionic conductivity , reducing the interfacial impedance of the LNMO electrode, and improving the electrochemical performance of LNMO/Li half-cells and LNMO/Li 4 Ti 5 O 12 full-cells. As measured by the nuclear magnetic resonance , the incorporation of TMSP and TTFP significantly reduced the HF content in the electrolytes. Therefore, both LNMO/Li half-cells (500 cycles with 95.7% capacity retention) and LNMO/Li 4 Ti 5 O 12 full-cells (200 cycles with 79.9% capacity retention) displayed higher cycling stabilities at 5 C owing to the synergistic effect of TMSP and TTFP. In comparison, capacity retentions of ∼76.5% after 500 cycles and ∼37.2% after 200 cycles were respectively achieved for the LNMO/Li half-cells and LNMO/Li 4 Ti 5 O 12 full-cells with the standard electrolyte at 5 C. This study provides strong evidence that additive combinations can improve the electrochemical performance of high-energy and high-voltage 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
Energy Storage Materials
·
2025
·
IF 20.2
Ridong Hu,Chong Mao,Hao Zhuo,Xiaobing Dai,Lewen Yang,Xugang Shu,Yang Li,Zhanqiang Li,Wenhong Ruan,Fujie Yang,Xudong Chen
The precarious interfacial chemistry between the electrode and electrolyte is the determining step that restricts the long cycle life of Ni-rich-based Li-metal batteries. Here we show that the robust cathode electrolyte interphase (CEI) and solid electrolyte interphase (SEI) layers can be engineered by tuning the spatial linking structure of dipentacyclic anhydride (DPA) additives. Specifically, an inorganic-rich CEI/SEI layer induced by CBDA (a DPA featuring a quaternary ring spatial linking structure) exhibits superior Li + interfacial kinetics and an ultra-stable cycle performance, outperforming the other systems. As a result, the NCM811ǁLi cells containing CBDA show excellent long-term performances, even under high voltage, high load, and high charge-discharge current density, respectively. The coin-cell using a low-loading cathode exhibits 129 mAh g- 1 discharged capacity for over 200 cycles at a 6 C rate. Moreover, The high-loading cathode retains 80 % capacity after 312 cycles at 1.0 C. Furthermore, the NCM811ǁLi pouch cell demonstrated a capacity retention rate of 99.8 % after 50 cycles. Prolonged stable cycling for 900 cycles (93 % capacity retention) in an NCM811ǁGraphite pouch cell is enabled by CBDA. The DPA-based additives in this work offer a highly promising and feasible route to achieving a long-term and high-capacity lithium battery featuring a Ni-rich cathode.
研究领域:
电化学储能
·
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Weixia Lv,Caijian Zhu,Jun Chen,Caixia Ou,Qian Zhang,Shengwen Zhong
In this work, the solvent and lithium salt are modified simultaneously to improve the low temperature performance of the electrolyte. The butyl acrylate (BA) with low melting point and high dielectric constant is combined with the ethylene carbonate (EC) with high dielectric constant and excellent film-forming property, which used as mixed additives. On the other hand, the LiBF 4 with small ion size and large ion mobility is chose to mixed with LiPF 6 with best comprehensive performance, which are used as mixed lithium salts. The BA + EC + LBF mixed additives improves the solubility, conductivity and melting point of the electrolyte, and effectively improves the composition, thickness and uniformity of the CEI film, which together increased the capacity and voltage platform of the batteries at low temperatures. The discharge capacities of BA16%+EC10%+0.3 M LBF battery at −10, −20, −30 and −40 °C are 173.1, 156.0, 147.0, and 119.3 mAh/g respectively, which are much higher than the batteries with the electrolyte without adding additives (122.0, 107.8, 95.7, and 74.3 mAh/g respectively). Furthermore, BA + EC + LBF can form a porous and thin LiF CEI film on the cathode surface, which is very favorable for transport of Li + , further improve the behaviors of the batteries at different low temperatures. Even in the case of charging and discharging at −40 °C, its discharge capacity can be stably maintained at 85 mAh/g. The BA + EC + LBF mixed additives used in this work as an effective strategy to improve the comprehensive behaviors of the battery at low temperatures, which would provide a new insight to design high performance of low temperature electrolyte.
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
·
2023
·Vol. 33
·期 19
·2212150
·
IF 19
Zhongsheng Wang,Chunlei Zhu,Jiandong Liu,Xinhong Hu,Yulu Yang,Shihan Qi,Huaping Wang,Daxiong Wu,Junda Huang,Pengbin He,Jianmin Ma
Tailoring inorganic components of cathode electrolyte interphase (CEI) and solid electrolyte interphase (SEI) is critical to improving the cycling performance of lithium metal batteries. However, it is challenging due to complicated electrolyte reactions on cathode/anode surfaces. Herein, the species and inorganic component content of the CEI/SEI is enriched with an objectively gradient distribution through employing pentafluorophenyl 4-nitrobenzenesulfonate (PFBNBS) as electrolyte additive guided by engineering bond order with functional groups. In addition, a catalytic effect of LiNi 0.6 Mn 0.2 Co 0.2 O 2 (NCM622) cathode is proposed on the decomposition of PFBNBS. PFBNBS with lower highest occupied molecular orbital can be preferentially oxidized on the NCM622 surface with the help of the catalytic effect to induce an inorganic-rich CEI for superior electrochemical performance at high voltage. Moreover, PFBNBS can be reduced on the Li surface due to its lower lowest unoccupied molecular orbital , increasing inorganic moieties in SEI for inhibiting Li dendrite generation. Thus, 4.5 V Li||NCM622 batteries with such electrolyte can retain 70.4% of initial capacity after 500 cycles at 0.2 C, which is attributed to the protective effect of the excellent CEI on NCM622 and the inhibitory effect of its derived CEI/SEI on continuous electrolyte decomposition.
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）