Lu Lun, Jing Liwei, Yang Zhizheng, Yang Guangyu, Wang Cheng, Wang Jinguo, Wang Huiyuan, Jiang Qichuan
Key Laboratory of Automobile Materials of Ministry of Education, Department of Materials Science and Engineering, Jilin University No. 5988 Renmin Street Changchun 130025 PR China
Institute of Scientific and Technical Information of Jilin Province No. 940, Shenzhen Road Changchun 130033 PR China.
RSC Adv. 2018 Mar 1;8(17):9125-9133. doi: 10.1039/c8ra00470f. eCollection 2018 Feb 28.
ZnS nanoparticles are grown on reduced graphene oxides (rGO) a simplified one-step hydrothermal method. Sodium carboxymethyl cellulose (CMC) is firstly applied as the binder for ZnS based anodes and shows a more advantageous binding effect than PVDF. To simplify the synthesis procedure, l-cysteine is added as the sulfur source for ZnS and simultaneously as the reducing agent for rGO. The average diameter of ZnS nanoparticles is measured to be 13.4 nm, and they uniformly disperse on the rGO sheets without any obvious aggregation. As anode materials, the CMC bound ZnS-rGO nanocomposites can maintain a high discharge capacity of 705 mA h g at a current density of 500 mA g for 150 cycles. The significantly improved electrochemical performance mainly derives from the combined effects of the small and uniformly dispersed ZnS nanoparticles, the high conductivity and structural flexibility of rGO and the strong binding ability of CMC.
采用一种简化的一步水热法在还原氧化石墨烯（rGO）上生长硫化锌纳米颗粒。羧甲基纤维素钠（CMC）首次被用作硫化锌基负极的粘结剂，并且显示出比聚偏氟乙烯更有利的粘结效果。为了简化合成过程，添加L-半胱氨酸作为硫化锌的硫源，同时作为还原氧化石墨烯的还原剂。测得硫化锌纳米颗粒的平均直径为13.4纳米，它们均匀地分散在还原氧化石墨烯片上，没有任何明显的聚集。作为负极材料，羧甲基纤维素钠粘结的硫化锌-还原氧化石墨烯纳米复合材料在500 mA g的电流密度下循环150次时，能够保持705 mA h g的高放电容量。显著改善的电化学性能主要源于小尺寸且均匀分散的硫化锌纳米颗粒、还原氧化石墨烯的高导电性和结构柔韧性以及羧甲基纤维素钠的强粘结能力的综合作用。
