Application of Si particles recycled from industrial waste for Si/rGO electrode composition for lithium rechargeable battery production

• Published in: Molecular Crystals and Liquid Crystals 2020-08, Vol.707 (1), p.147-153
• Main Authors: Pham, Tuan Kiet, Shin, Jihye, Song, Hoonsub, Lim, Sung Nam, Cho, Namchul, Ahn, Wook
• Format: Article
• Language: English
• Subjects: Batteries; Current density; Graphene; Industrial wastes; Lithium; Lithium ion battery; Lithium-ion batteries; Nanoparticles; Photovoltaics; Rechargeable batteries; recycled silicon; Self-assembly; Silicon; silicon anode electrode; silicon nanoparticle; silicon/reduced graphene oxide composite; Sludge; Surfactants
• ISSN: 1542-1406; 1563-5287; 1527-1943
• DOI: 10.1080/15421406.2020.1743466

In this work, a facile synthesis method of silicon/reduced graphene oxide composite (SRC) for lithium ion battery (LIB) production using silicon particles recycled from photovoltaic industrial waste sludge is demonstrated. The surfactant assisted self-assembly is effective in synthesizing homogeneous SRC. The SRC from recycled Si presents a high initial capacity of 1480 mAh g −1 at a current density of 100 mA g −1 with stable capacity retention of 65% after 50 cycles at a current density of 200 mA g −1 . The rate capability tests show prospective performances of 962 and 623 mAh g −1 at current density of 500 mA g −1 and 2 A g −1 , respectively. The high rate capability is attributed to the direct connection of rGO nanosheets on the surface of Si nanoparticles (NPs). This facile surfactant assisted self-assembly synthesis presented in this study is an unprecedented verification of Si particle recycling from industrial waste for lithium rechargeable battery production.