SnO2 nanosheets grown on in-situ formed N-doped branched TiO2/C nanofibers as binder-free anodes for sodium-ion storage
SnO2 nanosheets grown on in-situ formed N-doped branched TiO2/C nanofibers as binder-free anodes for sodium-ion storage
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DOI：
10.1016/j.electacta.2022.140049
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发表时间：
2022-02
影响因子：
6.6
通讯作者：
Ling Wang;Changzheng Lin;Guorui Yang;Ning Wang;Wei Yan
中科院分区：
文献类型：
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作者：
Ling Wang;Changzheng Lin;Guorui Yang;Ning Wang;Wei Yan
SnO2is considered as a promising anode material for sodium-ion storage. However, the low electrical conductivity and large volume expansion during repeated cycling process hinder its practical application. To address these issues, we designed a hybrid structure in which SnO2nanosheets were grown on in-situ formed N-doped branched TiO2/C nanofibers (NBT/C@SnO2NFs). This unique design can improve the conductivity and structural stability of the electrode, provide enough space for volume expansion, and accelerate the transfer rate of electrons and ions, thereby enhancing the electrochemical performance. As a result, when directly used as an anode for sodium-ions batteries, the binder-free NBT/C@SnO2NFs electrode exhibits outstanding cycling stability, with a reversible discharge capacity of 420.7 mA h g−1after 500 cycles at 200 mA g−1and still achieves 330.6 mA h g− 1at a very high current density of 2000 mA g−1. This work provides a novel strategy for the design of electrode materials for other high-performance battery systems.
