A Green Strategy for Preparation of Honeycomb-like Silicon Composite with Enhanced Lithium Storage Properties
The investigation of high-performance silicon (Si) composite electrodes is being widely developed due to their considerable theoretical capacity. Carbon-based materials coating is an efficient way to solve common issues of Si-based materials. In current, most reported strategies are complicated, polluted or uneconomic, which hampers its practical application. Herein, a honeycomb-like Si-based composite was prepared to address these issues via a facile and green reduction approach at room temperature. The pre-anchored Si nanoparticles could be packaged and interconnected through three-dimensional graphene network to further enhance electrochemical properties of active materials. As an electrode, this composite shows good rate capabilities upon lithium storage and cycling stability. The continued cycling measurement delivers a −0.049% capacity decay rate per cycle within 600 cycles. The direct comparison further exhibits the obviously improved performance between as-designed Si-based composite and naked Si, suggesting a potential application of this convenient strategy for other high-performance electrode materials.