Wang Liubin, Wang Chenchen, Li Fujun, Cheng Fangyi, Chen Jun
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University & Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P. R. China.
Chem Commun (Camb). 2017 Dec 19;54(1):38-41. doi: 10.1039/c7cc08341f.
We report a facile method to in situ synthesize Bi nanoflakes on Ni foam (Bi/Ni) via a replacement reaction, which can directly work as an anode for sodium-ion batteries (SIBs) without further treatment. The integrated nanoflake structure of the Bi/Ni effectively accommodates the dramatic volume changes of Bi during cycling, and favors both electron and Na transport through the electrode. This ensures high cycling performance and good rate capability. The sodiation/desodiation of Bi is revealed to be composed of two successive steps: Bi ↔ NaBi and NaBi ↔ NaBi. This facile strategy will encourage more investigations into the design and synthesis of integrated electrodes for high-performance SIBs.
我们报道了一种通过置换反应在泡沫镍上原位合成铋纳米片（Bi/Ni）的简便方法，该方法无需进一步处理即可直接用作钠离子电池（SIB）的阳极。Bi/Ni的集成纳米片结构有效地适应了Bi在循环过程中的巨大体积变化，并有利于电子和Na通过电极传输。这确保了高循环性能和良好的倍率性能。Bi的 sodiation/desodiation 被揭示由两个连续步骤组成：Bi ↔ NaBi 和 NaBi ↔ NaBi。这种简便的策略将鼓励更多关于高性能SIB集成电极设计和合成的研究。
