Title |
Self-healing chemistry enables the stable operation of silicon microparticle anodes for high-energy lithium-ion batteries
|
---|---|
Published in |
Nature Chemistry, November 2013
|
DOI | 10.1038/nchem.1802 |
Pubmed ID | |
Authors |
Chao Wang, Hui Wu, Zheng Chen, Matthew T. McDowell, Yi Cui, Zhenan Bao |
Abstract |
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 (~3-8 µm), 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 ~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. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 5 | 28% |
United Kingdom | 2 | 11% |
Australia | 1 | 6% |
India | 1 | 6% |
Nigeria | 1 | 6% |
Japan | 1 | 6% |
Netherlands | 1 | 6% |
Unknown | 6 | 33% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 13 | 72% |
Scientists | 5 | 28% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 11 | 1% |
United Kingdom | 3 | <1% |
Germany | 2 | <1% |
India | 2 | <1% |
Netherlands | 1 | <1% |
Korea, Republic of | 1 | <1% |
Israel | 1 | <1% |
Australia | 1 | <1% |
Iran, Islamic Republic of | 1 | <1% |
Other | 3 | <1% |
Unknown | 828 | 97% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 246 | 29% |
Researcher | 135 | 16% |
Student > Master | 103 | 12% |
Student > Bachelor | 68 | 8% |
Student > Doctoral Student | 51 | 6% |
Other | 99 | 12% |
Unknown | 152 | 18% |
Readers by discipline | Count | As % |
---|---|---|
Chemistry | 255 | 30% |
Materials Science | 187 | 22% |
Engineering | 105 | 12% |
Chemical Engineering | 41 | 5% |
Energy | 28 | 3% |
Other | 54 | 6% |
Unknown | 184 | 22% |