Yang Min, Zhang Wen, Su Die, Wen Jiaxing, Liu Li, Wang Xianyou
National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion, School of Chemistry, Xiangtan University, Xiangtan 411105, China.
National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage and Conversion, School of Chemistry, Xiangtan University, Xiangtan 411105, China; Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy, Changsha 410000, China.
J Colloid Interface Sci. 2022 Jan;605:231-240. doi: 10.1016/j.jcis.2021.07.110. Epub 2021 Jul 23.
Flexible electrode plays a key role in flexible energy storage devices. The SnTe/C nanofibers membrane (SnTe/CNFM) with excellent mechanical flexibility has been successfully synthesized for the first time through electrospinning, and it demonstrates outstanding electrochemical performance as free-standing anode for lithium/sodium-ion batteries. The SnTe/CNFM electrode delivers a discharge capacity of 526.7 mAh g at 1000 mA g after 1000 cycles in lithium-ion half-cells and a discharge capacity of 236.5 mAh g at 500 mA g after 80 cycles in lithium-ion full-cells with a LiFePO cathode. Not only that, it shows a discharge capacity of 182.7 mAh g at 200 mA g after 200 cycles in sodium-ion half-cells and a high discharge capacity of 207.0 mAh g at 500 mA g after 50 cycles in sodium-ion full-cells with a NaMnO cathode. Moreover, the prepared SnTe/CNFM exhibits good mechanical flexibility. The SnTe/CNFM can still return to its original state without any breakage after bending, curling, folding and kneading. These results indicate that SnTe/CNFM is expected to become one of the promising free-standing anodes for lithium/sodium-ion batteries.
柔性电极在柔性储能装置中起着关键作用。通过静电纺丝首次成功合成了具有优异机械柔韧性的SnTe/C纳米纤维膜（SnTe/CNFM），并且它作为锂/钠离子电池的独立阳极展现出卓越的电化学性能。在锂离子半电池中，SnTe/CNFM电极在1000 mA g的电流下循环1000次后，放电容量为526.7 mAh g；在具有LiFePO阴极的锂离子全电池中，在500 mA g的电流下循环80次后，放电容量为236.5 mAh g。不仅如此，在钠离子半电池中，它在200 mA g的电流下循环200次后，放电容量为182.7 mAh g；在具有NaMnO阴极的钠离子全电池中，在500 mA g的电流下循环50次后，放电容量高达207.0 mAh g。此外，制备的SnTe/CNFM表现出良好的机械柔韧性。SnTe/CNFM在弯曲、卷曲、折叠和揉捏后仍能恢复到原始状态而不会有任何破损。这些结果表明，SnTe/CNFM有望成为锂/钠离子电池中有前景的独立阳极之一。
