纳米片
氧化还原
电化学
熔盐
碳化
石墨烯
电催化剂
碳纤维
材料科学
化学工程
钒
无机化学
流动电池
纳米技术
电极
化学
扫描电子显微镜
复合数
复合材料
电解质
工程类
物理化学
作者
Yanrong Lv,Lu Zhang,Gang Cheng,Pengfei Wang,Tianze Zhang,Chuanchang Li,Yingqiao Jiang,Zhangxing He,Lei Dai,Ling Wang
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2019-01-01
卷期号:166 (6): A953-A959
被引量:31
摘要
Carbon nanosheets were synthesized by facile molten salt route using glucose as carbon source, and employed as positive electrocatalyst for vanadium redox flow battery (VRFB). Two kinds of carbon nanosheets were obtained at glucose/salt mass ratio of 1:10 (CNS-10) and 1:100 (CNS-100), respectively. Compared with CNS-10, CNS-100 with graphene-like structure has crumpled shape and large surface area. Electrochemical measurements verify that as-prepared carbon nanosheets exhibit good electrocatalytic properties to VO2+/VO2+ redox reaction, and CNS-100 demonstrates the best performance. Excellent electrocatalytic performance of CNS-100 mainly comes from large specific area, crumpled shape and enhanced carbonization degree. These features favor the increase of reaction place, active site, and electrical conductivity, respectively, further accelerating the electrochemical kinetic process of VO2+/VO2+ redox reaction. The cell using CNS-100 as positive catalyst displays superior electrochemical performance. Higher discharge capacity and capacity retention can be achieved in the cell using CNS-100. Moreover, utilization of CNS-100 can lead to energy efficiency increase of 5.3% compared with pristine cell at 50 mA cm−2. Low-cost, high-performance, and graphene-like nanosheet obtained by molten salt route offers a broad application prospect for VRFB.
科研通智能强力驱动
Strongly Powered by AbleSci AI