An anode for use in a lithium-ion battery consists of a polymeric gel binder made of at least two polymers having carboxylic acid groups and silicon particles. The polymers are chemically cross-linked to form a polymer network, and covalent ester bonds are formed between the polymer network and the silicon particles.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 This invention was made with government support under Grant No. DE-AC02-05CH11231, awarded by the Department of Energy. The Government has certain rights in the invention.