Volume 91 Issue 46 | p. 26 | Concentrates
Issue Date: November 18, 2013

Self-Healing Battery Anodes

Polymer coating gives long life to experimental high-capacity Li-ion batteries
Department: Science & Technology
Keywords: lithium-ion battery, Li-ion battery, silicon battery, self-healing

In the search for lithium-ion batteries with ever-higher charge capacity, researchers have found that replacing the typical graphite anodes with ones made of silicon could boost the batteries’ charge capacity, in principle, by a factor of 10. But with each charge-discharge cycle, the silicon swells and shrinks substantially, cracking the anode and quickly ending the battery’s life. Stanford University’s Chao Wang, Zhenan Bao, Yi Cui, and coworkers show that . . .

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