摘要
制备了 L a3+ 、Ni2 + 、Li+ 等不同价态金属离子交换的聚苯乙烯阳离子交换树脂 ,然后进行炭化处理 ,分析了树脂炭化产物的组成和结构 ,并进一步考察了这些树脂炭化产物作为二次锂离子电池炭电极材料时的充放电性能。实验结果表明掺杂金属离子对树脂炭化过程中硫的裂解脱出具有催化促进作用 ,并且金属离子价越高 ,这种催化促进作用越明显。实验结果还表明在树脂中引入金属离子 ,对树脂炭化过程中形成的石墨层片微晶结构在纵向上的有序排列具有积极的引导促进作用。电化学实验结果还发现不同价态离子掺杂的聚苯乙烯阳离子交换树脂炭化处理后制备的炭电极材料充放电容量呈现出了明显的规律性 ,充放电容量均随着掺杂离子价态的升高而逐渐增大。
The polystyrene cation exchange resin was exchanged by La 3+ ,Ni 2+ ,Li + ions and then carbonized to make carbon materials. The compositions and constructions of the resin carbon materials were analyzed. The charge and discharge properties of the resin carbon materials as the electrodes of lithium ion cells were also tested. Results indicate that doping ions into resin has catalysis effect for sulfur removal from resin in carbonized process, and the higher valence the metal ion, the more remarkable the catalysis eaffect. It is also found that doping of metal ions has promoted the preferred orientation of graphite crystallite in the lengthway direction. The electrochemical test demonstrated that there is obvious law for the capacity of the charge and discharge of the resin carbon materials doped by different valence metal ions, the capacities of the charge and discharge increase gradually with the valence of doping metal ions.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
2000年第1期44-47,共4页
New Carbon Materials
基金
中国博士后科学基金!资助项目 ( No.4 50 6)
石油大学基础研究基金
关键词
离子掺杂
聚苯乙烯
炭材料
电极
锂电池
电池
Ion doping
Polystyrene cation exchange resin
Carbonized
Electrode material
