A novel silicon/carbon nanocomposite anode for high performance lithium-ion micro-battery

14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Li, X.Z.^1,2 ; Wang, X.H.^1,2 ; Li, S.W.^1,2 ; Qiu, X.P.^3

Institute of Microelectronics, Tsinghua University, China^1

Tsinghua National Laboratory for Information Science and Technology, China^2

Department of Chemistry, Tsinghua University, China^3

关键词: Direct prototyping;    Expansion and contraction;    Good capacity retentions;    Lithium ion intercalations;    Novel nanocomposites;    Silicon nanoparticles;    Specific capacities;    Threedimensional (3-d);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/557/1/012059/pdf
DOI  :  10.1088/1742-6596/557/1/012059

来源: IOP

【 摘 要 】

This paper reports a novel nanocomposite anode for lithium-ion battery, with high initial specific capacity (1200mAh/g) and good capacity retention (850mAh/g remaining after 30 cycles). Sufficient silicon nanoparticles (SiNPs) at anode make a significant contribution to specific capacity increase. Moreover, nano void space between SiNPs and carbon scaffold provide enough space for expansion and contraction of SiNPs during the process of lithium ion intercalation and deintercalation to ensure a long cycle life. The porous carbon scaffold is obtained from Si/SiO2-templated SU-8 photoresist. As such, this design and fabrication makes it possible to implement direct prototyping of three dimensional (3D) micro-battery on chip.