Shutdown potential adjustment of modified carbene adducts as additives for lithium ion battery electrolytes
Shutdown potential adjustment of modified carbene adducts as additives for lithium ion battery electrolytes
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改性卡宾加合物作为锂离子电池电解液添加剂的关断电位调节
DOI：
10.1016/j.jpowsour.2017.09.023
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发表时间：
2017
影响因子：
9.2
通讯作者：
I. Cekic-Laskovic
中科院分区：
文献类型：
--
作者：
P. Janssen;B. Streipert;R. Krafft;P. Murmann;R. Wagner;L. Lewis- Alleyne;G.-V. Röschenthaler;M. Winter;I. Cekic-Laskovic
为了提高锂离子电池(LIB)的固有安全性，防止电池热失控，我们研究了两种卡宾加合物电解液添加剂。研究了新合成的化合物(1，3-dimethylimidazolidin-2-μm-trifluoroborate(NHc-BF3)和1，3-dimethylimidazolidin-2-μm-tetrafluorotrifluoromethylphosphate(NHc-Pf4CF3)在LiNi1/3Co1/3Mn1/3O2(NMC111)电极上作为过充电保护停机添加剂在1MLiPF6中的应用。电解液。通过改变分子中的NHC配体(-BF3、-PF5、-PF4CF3)，所研究的卡宾加合物电解质添加剂的关闭电位可以针对不同截止电位的特定应用而定制。NHC-BF3被认为是一种很有前途的候选电极，NMC111电极的电压高达4.4伏比Li/Li+，而卡宾加合物NHC-PF4CF3是高压应用的理想选择，NMC基电极的电压高达4.6伏比Li/Li+。在NMC111/Li和NMC111/石墨电池中进行了电化学研究，用原子力显微镜(AFM)和X射线光电子能谱(XPS)验证了阴极上存在分解层，这是关断效应的原因。此外，还证明了所研究的电解液添加剂在正常条件下对锂金属电池和锂离子电池的性能都没有影响。
To improve the intrinsic safety of lithium ion batteries (LIBs) by preventing cells from a thermal runaway, we studied two carbene adduct electrolyte additives. The recently synthesized compounds (1,3-dimethylimidazolidin-2-μm-trifluoroborate (NHC-BF3) and 1,3-dimethylimidazolidin-2-μm-tetrafluorotrifluoromethylphosphate (NHC-PF4CF3)) were investigated on LiNi1/3Co1/3Mn1/3O2(NMC111) electrodes in Li metal and Li-ion cell setups as overcharge protection shutdown additives in 1M LiPF6in EC:DEC (3:7, by wt.) electrolyte. By varying the NHC-ligand (-BF3, -PF5, -PF4CF3) in the molecule, the shutdown potential of the investigated carbene adduct electrolyte additives can be tailored for specific applications with different cut-off potentials. NHC-BF3was identified as a promising candidate for the application with NMC111 electrodes up to 4.4 V vs. Li/Li+, whereas the carbene adduct NHC-PF4CF3is ideal for the high-voltage application with the NMC-based electrode up to 4.6 V vs. Li/Li+. Next to electrochemical investigations in NMC111/Li and NMC111/graphite cells, Atomic Force Microscopy (AFM) and X-Ray Photoelectron Spectroscopy (XPS) were performed to verify the presence of a decomposition layer on the cathode, responsible for the shutdown effect. Furthermore, it has been proven that the investigated electrolyte additives have no influence on the cell performance under normal conditions in both, Li metal and Li-ion cell setups.
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影响因子：
4.5
作者：
P. Niehoff;Elizabeth G. Kraemer;M. Winter
通讯作者：
P. Niehoff;Elizabeth G. Kraemer;M. Winter
影响因子：
9.2
作者：
H. Santner;K. Möller;J. Ivančo;M. Ramsey;F. Netzer;S. Yamaguchi;J. Besenhard;M. Winter
通讯作者：
H. Santner;K. Möller;J. Ivančo;M. Ramsey;F. Netzer;S. Yamaguchi;J. Besenhard;M. Winter
影响因子：
3.9
作者：
Murmann, Patrick;Schmitz, Raphael;Winter, Martin
通讯作者：
Winter, Martin
卡宾加合物作为锂离子电池过充保护剂
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
C. Dippel;René Schmitz;R. A. Müller;Tobias Böttcher;M. Kunze;Alexandra Lex‐Balducci;G. Röschenthaler;S. Passerini;M. Winter
通讯作者：
M. Winter
影响因子：
4.4
作者：
J. Skindhoj;J. Glatz-Reichenbach;R. Strümpler
通讯作者：
J. Skindhoj;J. Glatz-Reichenbach;R. Strümpler