Scalable synthesis of ant-nest-like bulk porous silicon for high-performance lithium-ion battery anodes.

ABSTRACT: Although silicon is a promising anode material for lithium-ion batteries, scalable synthesis of silicon anodes with good cyclability and low electrode swelling remains a significant challenge. Herein, we report a scalable top-down technique to produce ant-nest-like porous silicon from magnesium-silicon alloy. The ant-nest-like porous silicon comprising three-dimensional interconnected silicon nanoligaments and bicontinuous nanopores can prevent pulverization and accommodate volume expansion during cycling resulting in negligible particle-level outward expansion. The carbon-coated porous silicon anode delivers a high capacity of 1,271 mAh g^-1 at 2,100 mA g^-1 with 90% capacity retention after 1,000 cycles and has a low electrode swelling of 17.8% at a high areal capacit

SUBMITTER: An W 

PROVIDER: S-EPMC6441089 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature