共查询到20条相似文献,搜索用时 15 毫秒
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Lithium‐Ion Batteries: Flexible Composite Solid Electrolyte Facilitating Highly Stable “Soft Contacting” Li–Electrolyte Interface for Solid State Lithium‐Ion Batteries (Adv. Energy Mater. 22/2017) 下载免费PDF全文
Luyi Yang Zijian Wang Yancong Feng Rui Tan Yunxing Zuo Rongtan Gao Yan Zhao Lei Han Ziqi Wang Feng Pan 《Liver Transplantation》2017,7(22)
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Synthesis and Characterization of Lithium Bis(fluoromalonato)borate for Lithium‐Ion Battery Applications 下载免费PDF全文
Chen Liao Kee Sung Han Loïc Baggetto Daniel A. Hillesheim Radu Custelcean Eun‐Sung Lee Bingkun Guo Zhonghe Bi De‐en Jiang Gabriel M. Veith Edward W. Hagaman Gilbert M. Brown Craig Bridges M. Parans Paranthaman Arumugam Manthiram Sheng Dai Xiao‐Guang Sun 《Liver Transplantation》2014,4(6)
A new orthochelated salt, lithium bis(monofluoromalonato)borate (LiBFMB), is synthesized and purified for application in lithium‐ion batteries. The presence of fluorine in the borate anion of LiBFMB increases its oxidation potential and also facilitates ion dissociation, as reflected by the ratio of ionic conductivity (σexp) and ion diffusivity coefficients (σNMR). Half‐cell tests using 5.0 V lithium nickel manganese oxide (LiNi0.5Mn1.5O4) as a cathode and ethylene carbonate (EC)/dimethyl carbonate (DMC)/diethyl carbonate (DEC) as a solvent reveals that the impedance of the LiBFMB cell is much larger than those of LiPF6‐ and lithium bis(oxalato)borate (LiBOB)‐based cells, which results in lower capacity and poor cycling performance of the former. X‐ray photoelectron spectroscopy (XPS) results for the cycled cathode electrode suggest that because of the stability of the LiBFMB salt, the solid electrolyte interphase (SEI) formed on the cathode surface is significantly different from those of LiPF6 and LiBOB based electrolytes, resulting in more solvent decomposition and a thicker SEI layer. Initial results also indicate that using a high dielectric constant solvent, propylene carbonate, alters the surface chemistry, reduces the interfacial impedance, and enhances the performance of LiBFMB‐based 5.0 V cell. 相似文献
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Advanced Electrolytes for Fast‐Charging High‐Voltage Lithium‐Ion Batteries in Wide‐Temperature Range
Xianhui Zhang Lianfeng Zou Yaobin Xu Xia Cao Mark H. Engelhard Bethany E. Matthews Lirong Zhong Haiping Wu Hao Jia Xiaodi Ren Peiyuan Gao Zonghai Chen Yan Qin Christopher Kompella Bruce W. Arey Jun Li Deyu Wang Chongmin Wang Ji‐Guang Zhang Wu Xu 《Liver Transplantation》2020,10(22)
LiNixMnyCo1?x?yO2 (NMC) cathode materials with Ni ≥ 0.8 have attracted great interest for high energy‐density lithium‐ion batteries (LIBs) but their practical applications under high charge voltages (e.g., 4.4 V and above) still face significant challenges due to severe capacity fading by the unstable cathode/electrolyte interface. Here, an advanced electrolyte is developed that has a high oxidation potential over 4.9 V and enables NMC811‐based LIBs to achieve excellent cycling stability in 2.5–4.4 V at room temperature and 60 °C, good rate capabilities under fast charging and discharging up to 3C rate (1C = 2.8 mA cm?2), and superior low‐temperature discharge performance down to ?30 °C with a capacity retention of 85.6% at C/5 rate. It is also demonstrated that the electrode/electrolyte interfaces, not the electrolyte conductivity and viscosity, govern the LIB performance. This work sheds light on a very promising strategy to develop new electrolytes for fast‐charging high‐energy LIBs in a wide‐temperature range. 相似文献
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MnPO4‐Coated Li‐NCM: MnPO4‐Coated Li(Ni0.4Co0.2Mn0.4)O2 for Lithium(‐Ion) Batteries with Outstanding Cycling Stability and Enhanced Lithiation Kinetics (Adv. Energy Mater. 27/2018) 下载免费PDF全文
Zhen Chen Guk‐Tae Kim Dominic Bresser Thomas Diemant Jakob Asenbauer Sangsik Jeong Mark Copley Rolf Jürgen Behm Jianyi Lin Zexiang Shen Stefano Passerini 《Liver Transplantation》2018,8(27)
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Lithium Polyacrylate (LiPAA) as an Advanced Binder and a Passivating Agent for High‐Voltage Li‐Ion Batteries 下载免费PDF全文
Nicholas P. W. Pieczonka Valentina Borgel Baruch Ziv Nicole Leifer Vadim Dargel Doron Aurbach Jung‐Hyun Kim Zhongyi Liu Xiaosong Huang Sergey A. Krachkovskiy Gillian R. Goward Ion Halalay Bob R. Powell Arumugam Manthiram 《Liver Transplantation》2015,5(23)
Intensive studies of an advanced energy material are reported and lithium polyacrylate (LiPAA) is proven to be a surprisingly unique, multifunctional binder for high‐voltage Li‐ion batteries. The absence of effective passivation at the interface of high‐voltage cathodes in Li‐ion batteries may negatively affect their electrochemical performance, due to detrimental phenomena such as electrolyte solution oxidation and dissolution of transition metal cations. A strategy is introduced to build a stable cathode–electrolyte solution interphase for LiNi0.5Mn1.5O4 (LNMO) spinel high‐voltage cathodes during the electrode fabrication process by simply using LiPAA as the cathode binder. LiPAA is a superb binder due to unique adhesion, cohesion, and wetting properties. It forms a uniform thin passivating film on LNMO and conducting carbon particles in composite cathodes and also compensates Li‐ion loss in full Li‐ion batteries by acting as an extra Li source. It is shown that these positive roles of LiPAA lead to a significant improvement in the electrochemical performance (e.g., cycle life, cell impedance, and rate capability) of LNMO/graphite battery prototypes, compared with that obtained using traditional polyvinylidene fluoride (PVdF) binder for LNMO cathodes. In addition, replacing PVdF with LiPAA binder for LNMO cathodes offers better adhesion, lower cost, and clear environmental advantages. 相似文献