摘要
高电容量的电极材料对于需要高能量密度锂离子的携带式电子设备相当重要。由于需求不同,电极的制作方式与材料的选用相当繁杂。本研究是将回收硅粉和沥青粉末混合,再与炭毡复合成炭纸,经250℃稳定化与1 000℃炭化后,制备出兼具电极与集流板功能炭复合纸。经循环充放电测试后,添加不同比例硅粉(2.5 wt%, 5 wt%, 10 wt%)的负极,相较于炭复合电极放电电容量分别提升了94%、129%和41%。
High-capacity electrode materials are critical for portable electronic equipment that requires a high-energy density from lithium ion batteries (LIBs). Many different materials and fabrication methods for such electrodes have been developed for this purpose. Carbon paper coated with recycled silicon powder (CP-RSP) was prepared by coating silicon and pitch powder on the carbon paper, followed by stabilization at 250 ℃ in air and carbonization at 1 000 ℃ in N 2. The CP-RSP acted as both the current-collector and the active material for the anodes of LIBs. Electrodes with 2.5, 5, and 10 wt.% silicon exhibited capacity increases of 94, 129 and 41%, respectively, compared with the silicon-free electrode. The electrode for the CP-RSP with 5 wt.% silicon exhibited an optimal balance between discharge capacity and stability in long-cycle tests under various charging rates.
作者
沈晋炜
柯泽豪
邱国峰
吕晃志
廖廷嘉
刘璟翰
SHEN Chin-Wei;KO Tse-Hao;CHIU Kuo-Feng;LEU Hoang-Jyh;LIAO Ting-Chia;LIU Ching-Han(Carbon Laboratory for Department of Materials Science and Engineering, Feng Chia University, Taichung 40724, China)
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2019年第2期140-145,共6页
New Carbon Materials
基金
Ministry of Science and Technology,China(MOST 104-2221-E-035-010)~~
关键词
高电容量电极材料
锂离子电池
炭复合纸
含硅电极
High-capacity electrode materials
Lithium-ion batteries
Carbon composite paper
Silicon-containing electrodes