Lithium Storage in Heat‐Treated SnF2/Polyacrylonitrile Anode |
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| Authors: | Dr Lian Shen Dr Lanyao Shen Prof Zhaoxiang Wang Prof Liquan Chen |
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| Affiliation: | Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Device, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (P. R. China) |
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| Abstract: | Tin(II) fluoride (SnF2) has a high Li‐storage capacity because it stores lithium first by a conversion reaction and then by a Li/Sn alloying/dealloying reaction. A polyacrylonitrile (PAN)‐bound SnF2 electrode was heat‐treated to enhance the integral electrical contact and the mechanical strength through its cross‐linked framework. The heat‐treated SnF2 electrode showed reversible capacities of 1047 mAh g?1 in the first cycle and 902 mAh g?1 after 100 cycles. Part of the excess capacity is due to lithium storage at the Sn/LiF interface, and the other part is assumed to correspond to the presence of reduced SnF2 with protons released during the thermal cross‐linking of PAN. |
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| Keywords: | batteries electrochemistry lithium polymers tin |
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