1 research outputs found
Scalable Synthesis of a Si/C Composite Derived from Photovoltaic Silicon Kerf Waste toward Anodes for High-Performance Lithium-Ion Batteries
The
solid waste from solar photovoltaic (PV) systems diverges from
carbon neutrality targets and the core principles of clean energy.
Herein, we present an innovative and cost-effective strategy to fabricate
P-SKW@C as anode materials based on the natural properties of submicron
silicon kerf waste (SKW) by increasing the surface oxide layer and
combining the synergistic effects of magnesium thermal and acid leaching.
In particular, the carbon layer establishes channels for electron
and ion transport, thereby enhancing the conductivity of P-SKW@C and
the mobility of lithium ions. The formation of pores by the synergistic
effects of magnesium thermal and acid leaching provides buffer space
to accommodate the volume changes in silicon, ensuring the structural
integrity of the electrode. Specifically, the P-SKW@C anode exhibits
superior rate performance, reaching 1006 mAh g–1 at 2 A g–1, and an outstanding reversible capacity
of 1103 mAh g–1 with the current density returning
to 0.2 A g–1. Furthermore, the P-SKW@C anode demonstrates
a remarkable specific capacity of 905 mAh g–1 at
500 mA g–1 over 200 cycles. Notably, the assembled
LiFePO4//P-SKW@C full cell maintains a stable capacity
of 105.96 mAh g–1 and an energy density of 329.84
Wh kg–1 at 0.5 °C after 50 cycles. This work
introduces a new strategy for recycling the SKW in a sustainable,
economical, and environmentally friendly way, facilitating the integration
of solid waste and energy storage