Suppression on allotropic transformation of Sn planar anode with enhanced electrochemical performance
Suppression on allotropic transformation of Sn planar anode with enhanced electrochemical performance
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抑制Sn平面阳极的同素异形转变，增强电化学性能
DOI：
10.1016/j.apsusc.2017.11.079
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发表时间：
2018-03
影响因子：
6.7
通讯作者：
Guosheng Shao
中科院分区：
文献类型：
--
作者：
Peng Wang;Junhua Hu;Guoqin Cao;Shilin Zhang;Peng Zhang;Changhao Liang;Zhuo Wang;Guosheng Shao
Different configurations of Sn and C films were deposited and used as a planar anode for Li ion battery. The interplay of carbon layer with Sn as supporting and buffering, respectively, was revealed. The suppression on the allotropic transformation to α phase by a carbon layer results in a significantly improved capacity retention rate, which also avoids the crack of Sn film. As expected, a conductive carbon layer improves rating performance. However, a supporting carbon layer (SC) just contributes to the charge transfer process. A DFT approach was used to assess the allotropic transformation process. An additional barrier (∼0.86 eV) exits on the α-β diagram, which is responsible for the irreversibility of α phase back to β phase. An enhanced persistence of β phase in Sn/C anode contributes to cycling performance. A Li rich condition contributes to the stabilization of β-Sn, which is thermodynamically favored. A nano buffering carbon (BC) layer can evidently alleviate the side reaction on Sn surface, which in turn promotes the diffusion of Li ions in electrode and generates a Li rich condition. The direct contact of Sn with electrolyte leads to serious accumulation of α-Sn during cycling and results in a poor cycling performance. By the synergistic effect of BC and SC, a sandwich C/Sn/C structure demonstrates an enchantment in electrochemical behavior.
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影响因子：
8.6
作者：
Li, H;Wang, Q;Huang, XJ
通讯作者：
Huang, XJ
硅和碳化硅基底上纳米结构硅化镁的反应气相沉积及其电化学性能
影响因子：
4.1
作者：
Zhenya Fu;Guosheng Shao;H. Tatsuoka;Junhua Hu
通讯作者：
Junhua Hu
影响因子：
3
作者：
Caili Zhang;Angang Song;Peiling Yuan;Qian Wang;Peng Wang;Shilin Zhang;Guoqin Cao;Junhua Hu-
通讯作者：
Caili Zhang;Angang Song;Peiling Yuan;Qian Wang;Peng Wang;Shilin Zhang;Guoqin Cao;Junhua Hu-
影响因子：
3.9
作者：
Beaulieu, LY;Beattie, SD;Dahn, JR
通讯作者：
Dahn, JR
DOI：
10.1002/chin.201042226
发表时间：
2010-10
期刊：
ChemInform
影响因子：
--
作者：
Cheol‐Min Park;Jae‐Hun Kim;Kim Hansu Kim Hansu-Kim-Hansu;H. Sohn
通讯作者：
Cheol‐Min Park;Jae‐Hun Kim;Kim Hansu Kim Hansu-Kim-Hansu;H. Sohn