Chen Hezhang, Zhang Bao, Zhang Jiafeng, Yu Wanjing, Zheng Junchao, Ding Zhiying, Li Hui, Ming Lei, Bengono D A Mifounde, Chen Shunan, Tong Hui
School of Metallurgy and Environment, Central South University, Changsha, China.
School of Chemistry and Chemical Engineering, Central South University, Changsha, China.
Front Chem. 2018 Dec 18;6:629. doi: 10.3389/fchem.2018.00629. eCollection 2018.
SnS nanosheets/reduced graphene oxide (rGO) composite was prepared by reflux condensation and hydrothermal methods. In this composite, SnS nanosheets grew on the surface of rGO nanosheets. The SnS/rGO composite as anode material was investigated both in lithium ion battery (LIB) and sodium ion battery (SIB) systems. The capacity of SnS/rGO electrode in LIB achieved 514 mAh g at 1.2 A g after 300 cycles. Moreover, the SnS/rGO electrode in SIB delivered a discharge capacity of 645 mAh g at 0.05 A g; after 100 cycles at 0.25 A g, the capacity retention still keep 81.2% relative to the capacity of the 6th cycle. Due to the introduction of rGO in the composite, the charge-transfer resistance became much smaller. Compared with SnS/C electrode, SnS/rGO electrode had higher discharge capacity and much better cycling performance.
通过回流冷凝和水热法制备了硫化锡（SnS）纳米片/还原氧化石墨烯（rGO）复合材料。在该复合材料中，SnS纳米片生长在rGO纳米片表面。对SnS/rGO复合材料作为锂离子电池（LIB）和钠离子电池（SIB）系统的负极材料进行了研究。在LIB中，SnS/rGO电极在1.2 A g的电流密度下循环300次后，容量达到514 mAh g。此外，在SIB中，SnS/rGO电极在0.05 A g的电流密度下放电容量为645 mAh g；在0.25 A g的电流密度下循环100次后，相对于第6次循环的容量，容量保持率仍为81.2%。由于复合材料中引入了rGO，电荷转移电阻变得小得多。与SnS/C电极相比，SnS/rGO电极具有更高的放电容量和更好的循环性能。
