Bio-inspired engineering of Bi2S3-PPy yolk-shell composite for highly durable lithium and sodium storage

A bio-inspired yolk-shell architecture composed of Bi2S3 nanowires encapsulated in highly conductive and stretchable polypyrrole (PPy) film was designed and synthesized. The Bi2S3-PPy composite exhibits a high capacity and a stable cyclability for both Li and Na storage, thereby highlights its potential for rechargeable battery application.183