An All-Integrated Anode via Interlinked Chemical Bonding between Double-Shelled-Yolk-Structured Silicon and Binder for Lithium-Ion Batteries

Journal: Advanced Materials

Published: 2017-10-12

DOI: 10.1002/adma.201703028

Affiliations: 4

Authors: 9

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Research Highlight

Sticky spheres of silicon enhance electrodes

© blackred/E+/Getty

© blackred/E+/Getty

Rechargeable batteries could deliver strong power for longer thanks to reinforced silicon spheres.

Silicon is a popular material for electrodes in rechargeable batteries, but it swells and shrinks, which eventually breaks the electrical contact. Protecting silicon inside a carbon shell can overcome this, but producing these spheres is complex and requires toxic chemicals.

A team including researchers from the University of Wollongong built an electrode from spheres of silicon in carbon shells, each with a silica core. The silica provided extra structural support while a gap between the silicon spheres and outer carbon shells accommodated swelling. The researchers then bound the nanospheres together with a mixture of cellulose and citric acid — two cheap and environmentally friendly chemicals. In a sample fuel cell, the electrode provided high electrical charge and retained 85 per cent of its original charge after 1,000 charge-discharge cycles.

These electrodes could improve the performance and safety of the next generation of rechargeable batteries.

Supported content

  1. Advanced Materials 29, 1703028 (2017). doi: 10.1002/adma.201703028
Institutions Share
Institute for Superconducting and Electronic Materials (ISEM), UOW, Australia 0.72
School of Mechanical, Materials, Mechatronic and Biomedical Engineering (MMM), UOW, Australia 0.11
College of Automotive and Mechanical Engineering, CSUST, China 0.11
University of Wollongong (UOW), Australia 0.06