摘要
用不同的方法在石墨的表面包覆上一层酚醛树脂 ,然后在 N2 保护下 10 0 0℃炭化 1h制得复合炭材料 ,并用扫描电子显微镜 (SEM)对其表面物理形态进行观察分析 ,研究了复合炭材料的恒电流充放电性能。包覆在石墨表面的具有无定形结构的酚醛树脂炭能够有效阻止石墨在充放电过程中发生层状剥落 ,从而提高复合炭材料的循环稳定性 ,其中通过沉淀法制得的复合炭材料 (CPG- 30 )在十次循环后可逆容量为 32 6 m Ah· g- 1 ,比石墨高 45m Ah· g- 1 ,并保持了首次可逆容量的 96 .2 %。
Phenol resin / graphite composite was prepared by mixing graphite and phenol resin in methanol, carbonizing at 1 000 ℃ under N 2 after removing solvent. The surface morphology of resultant composites was observed by SEM. The constant current charge discharge properties of composites were investigated. The results showed that the disordered structure of phenol resin carbon on the surface of graphite can successfully protect the graphite from exfoliation to improve its cyclic performances. After ten time cycles, the reversible capacity of composite prepared by sediment was 326 mAh·g -1 which was 45 mAh·g -1 higher than that of graphite (281 mAh·g -1 ) did, remaining 96.2 % of its first reversible capacity.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
2000年第2期28-33,共6页
New Carbon Materials
关键词
酚醛树脂
炭
石墨
复合炭材料
锂离子电池
炭阳
Phenol resin carbon/graphite composite
Lithium ion battery
Carbon anode
