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Updated: Aug 4, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
Amorphous SnS (1 < x < 2) Anode with a High-Rate Li Alloying Reaction for Li-Ion Batteries
Bing Lu1, Zhenyang Xie1, Min Qu1
1Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization, School of Chemistry & Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China.
Abstract:
Here, we report the conversion of bulk Li alloying anode reactions into surface reactions by the construction of amorphous structured SnSx active materials encapsulated in robust carbon nanofiber anodes. The high-temperature phase transformation from SnS to SnS2 is used to construct the SnS (1 < x < 2) active material with an amorphous structure and ultra-tiny particle size, leading to a decreased Li+ diffusion path, weakened volume change ratio, but considerably enhanced capacitance. The amorphous structure changes the Li-storage mechanism from Li-intercalation to the surface reaction, which endows each active particle with a rapid (de)lithiation characteristic. As a result, the high-rate (dis)charge property with a long-term cycle life is obtained for SnS@NC, which delivers an excellent rate capability of 633.4 mAh g-1 under 7 A g-1 and a capability retention of 785.2 mAh g-1 after 1600 cycles under 2 A g-1.
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