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High‐Voltage Li2SiO3−LiNi0.5Mn1.5O4 Hollow Spheres Prepared through In Situ Aerosol Spray Pyrolysis towards High‐Energy Li‐Ion Batteries
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-02-27 , DOI: 10.1002/celc.201701305 Jiang Wang 1 , Ping Nie 1 , Jiangmin Jiang 1 , Yuting Wu 1 , Ruirui Fu 1 , Guiyin Xu 1 , Yadi Zhang 1 , Hui Dou 1 , Xiaogang Zhang 1
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-02-27 , DOI: 10.1002/celc.201701305 Jiang Wang 1 , Ping Nie 1 , Jiangmin Jiang 1 , Yuting Wu 1 , Ruirui Fu 1 , Guiyin Xu 1 , Yadi Zhang 1 , Hui Dou 1 , Xiaogang Zhang 1
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High‐voltage Li2SiO3‐composited LiNi0.5Mn1.5O4 hollow spheres synthesized through a scalable in situ aerosol spray pyrolysis process combined with short‐term high‐temperature calcination are investigated as an ultralong‐life cathode for high‐energy Li‐ion batteries. The phase structure, morphology, and valence state of the LiNi0.5Mn1.5O4/Li2SiO3 composites are investigated by using X‐ray diffraction, electron microscopy, and X‐ray photoelectron spectroscopy. The three‐dimensional Li‐ion conductor Li2SiO3 can effectively enhance the Li+ diffusion rate, alleviate the side reactions, and reduce the formation of a solid electrolyte interphase (SEI) as a protective layer between the LiNi0.5Mn1.5O4 electrode and electrolyte interfaces. Li2SiO3‐composited LiNi0.5Mn1.5O4 has a better rate and cycling performance, especially long cycling performance. After 500 cycles at 25 °C at 1 C, the capacity retention of the composite is 93.28 %, and the capacity retention is 81.23 % after 400 cycles at 50 °C at 1 C rate. The excellent long cycling and capacity retention indicate that the three‐dimensional Li‐ion conductor Li2SiO3 composite with LiNi0.5Mn1.5O4 is a promising material for high‐energy Li‐ion batteries.
中文翻译：
通过向高能锂离子电池原位气溶胶喷雾热解制备的高压Li2SiO3-LiNi0.5Mn1.5O4空心球
研究了通过可扩展的原位气溶胶喷雾热解工艺和短期高温煅烧合成的高压Li 2 SiO 3复合LiNi 0.5 Mn 1.5 O 4中空球体，作为高能Li-的超长寿命阴极离子电池。利用X射线衍射，电子显微镜和X射线光电子能谱研究了LiNi 0.5 Mn 1.5 O 4 / Li 2 SiO 3复合材料的相结构，形态和价态。三维锂离子导体Li 2 SiO 3可以有效提高Li +扩散速率，减轻副反应，并减少在LiNi 0.5 Mn 1.5 O 4电极和电解质界面之间形成保护层的固体电解质中间相（SEI）。Li 2 SiO 3复合的LiNi 0.5 Mn 1.5 O 4具有更好的速率和循环性能，特别是循环性能长。在25°C下于1 C下进行500次循环后，复合材料的容量保持率为93.28％，在50°C下以1 C速率进行400次循环后，复合材料的容量保持率为81.23％。出色的长循环性和容量保持性表明，三维Li-ion导体LiLiNi 0.5 Mn 1.5 O 4的2 SiO 3复合材料是用于高能锂离子电池的有前途的材料。
更新日期：2018-02-27
中文翻译：
通过向高能锂离子电池原位气溶胶喷雾热解制备的高压Li2SiO3-LiNi0.5Mn1.5O4空心球
研究了通过可扩展的原位气溶胶喷雾热解工艺和短期高温煅烧合成的高压Li 2 SiO 3复合LiNi 0.5 Mn 1.5 O 4中空球体，作为高能Li-的超长寿命阴极离子电池。利用X射线衍射，电子显微镜和X射线光电子能谱研究了LiNi 0.5 Mn 1.5 O 4 / Li 2 SiO 3复合材料的相结构，形态和价态。三维锂离子导体Li 2 SiO 3可以有效提高Li +扩散速率，减轻副反应，并减少在LiNi 0.5 Mn 1.5 O 4电极和电解质界面之间形成保护层的固体电解质中间相（SEI）。Li 2 SiO 3复合的LiNi 0.5 Mn 1.5 O 4具有更好的速率和循环性能，特别是循环性能长。在25°C下于1 C下进行500次循环后，复合材料的容量保持率为93.28％，在50°C下以1 C速率进行400次循环后，复合材料的容量保持率为81.23％。出色的长循环性和容量保持性表明，三维Li-ion导体LiLiNi 0.5 Mn 1.5 O 4的2 SiO 3复合材料是用于高能锂离子电池的有前途的材料。
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