Journal
NATURE CHEMISTRY
Volume 5, Issue 12, Pages 1042-1048Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NCHEM.1802
Keywords
-
Categories
Funding
- Department of Energy, through the SLAC National Accelerator Laboratory LDRD project [DE-AC02-76SF00515]
- Precourt Institute for Energy at Stanford University
Ask authors/readers for more resources
The ability to repair damage spontaneously, which is termed self-healing, is an important survival feature in nature because it increases the lifetime of most living creatures. This feature is highly desirable for rechargeable batteries because the lifetime of high-capacity electrodes, such as silicon anodes, is shortened by mechanical fractures generated during the cycling process. Here, inspired by nature, we apply self-healing chemistry to silicon microparticle (SiMP) anodes to overcome their short cycle-life. We show that anodes made from low-cost SiMPs (similar to 3-8 mu m), for which stable deep galvanostatic cycling was previously impossible, can now have an excellent cycle life when coated with a self-healing polymer. We attain a cycle life ten times longer than state-of-art anodes made from SiMPs and still retain a high capacity (up to similar to 3,000 mA h g(-1)). Cracks and damage in the coating during cycling can be healed spontaneously by the randomly branched hydrogen-bonding polymer used.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available