fig13
![Research on carbon-based and metal-based negative electrode materials via DFT calculation for high potassium storage performance: a review](https://image.oaes.cc/37f9fa8a-26c3-4c29-965c-1a23c647b2d4/em3035.fig.13.jpg)
Figure 13. (A) Schematic illustration of 3D Sn@G-PGNWs. Copyright 2014, ACS Nano[141]. (B) Schematic illustration of the synthesis of Sn4P3 and Sn4P3@C. Copyright 2019, Energy Storage Materials[144]. (C) Schematic illustration of the synthesis of Sn4P3/MGS-80.