Purification of silicon from waste photovoltaic cells and its value-added application in lithium-ion batteries

Abstract

The global exponential increases in annual photovoltaic (PV) installations and the resultant PV-cells waste is an increasing serious concern. How to dispose of and value-added recycling of these end-of-life PV...

Advancing sustainable end-of-life strategies for photovoltaic modules with silicon reclamation for lithium-ion battery anodes

“…On the other hand, morphology conversion must be considered in the upcycling process. 69 Zhang et al 70 utilized nanometal catalyzed HF acid etching to recover porous Si/carbon anode materials after a simple purification process. Because of the properties of Si, HF is always used to make pores on Si, 63,70 while it is not expected in a sustainable process.…”

“…69 Zhang et al 70 utilized nanometal catalyzed HF acid etching to recover porous Si/carbon anode materials after a simple purification process. Because of the properties of Si, HF is always used to make pores on Si, 63,70 while it is not expected in a sustainable process. Fortunately, there are many ways to obtain a porous structure for Si.…”

Cyanosol-enabled ultrafine alloy nanocrystals on graphene as a hybridization matrix for long-life and high-rate silicon anodes

“…Owing to its high theoretical capacity and safety, silicon-based anode technology has been considered to be the key route to construct Li-ion batteries (LIBs) with high energy densities (4300 W h kg À1 ). [1][2][3][4][5][6][7] However, the practical application of silicon anodes has been largely hindered by huge volume changeinduced capacity decay as well as poor rate capability originating from low Li-ion diffusion coefficient (10 À14 -10 À13 cm 2 s À1 ) and intrinsic electric conductivity (B10 À3 S cm À1 ). 1,2 To overcome these challenges, hybridizing silicon with flexible and/or conductive components has proved to be effective in improving cycle life and rate capability.…”