摘要
为获得钒电池正极材料的最佳碳化温度,提出了4种经由2阶段碳化获得聚丙烯腈基(PAN基)碳毡的方案,并对样品的结构演变和电化学性能进行了分析。结果表明:800~1 000℃是第1阶段碳化中纤维石墨网晶面快速扩大的温度区间,该阶段的碳化温度越高;而后在第2阶段碳化中获得的PAN基碳毡石墨化程度更高,尤其在经由1 200~1 400℃的第1阶段碳化后最为显著;由两段碳化温度分别在1 200和1 800℃获得的PAN基碳毡的电化学活性最高,可作为钒电池的正极材料。
In order to obtain the optimum carbonization temperature of anode electrode materials for all vanadium redox battery, four schemes were proposed to obtain a polyacrylonitrile based carbon felt via two-stage carbonization. The structural evolution and electrochemical properties were investigated. The rapid expansion of fiber graphite network at the first stage of carbonization occurs at 800-1 000 ℃. The results show that a greater carbonization temperature at the first stage of carbonization gives a higher graphitization degree of polyacrylonitrile based carbon felt after the second stage of carbonization, especially at the first stage of carbonization temperature range from 1200 to 1400 ℃. The electrochemical activity of the polyacrylonitrile based carbon felt obtained in the two-stage carbonization at 1 200-1 800 ℃ is the maximum, which is suitable to be used as anode electrode materials for all vanadium redox battery.
作者
张欢
谭毅
罗旭东
陈娜
ZHANG Huan1,2,3, TAN Yi1,3, LUO Xudong2, CHEN Na2(1. College of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China; 2. School of High Temperature Materials and Magnesium Resource Engineering, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China; 3. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116024, Liaoning, Chin)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2018年第3期369-376,共8页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(51702144)资助
关键词
聚丙烯腈基碳毡
碳化
钒电池
结构
电化学
polyacrylonitrile based carbon felt
carbonization
all vanadium redox battery
structure
electrochemistry