Zheng Xiaoquan, a professor at Xi'an Jiaotong University School of Electrical Engineering, and Cui Wei, a professor at the School of Materials Science at Stanford University, and Li Ju, a professor at the Department of Nuclear Engineering at the Massachusetts Institute of Technology, worked together to coat a surface of a nano-silicon anode with a special method The titanium dioxide nano-layer is used to synthesize a high-strength Si@TiO2yolk-shell structure anode, and a Si@TiO2 structure silicon anode full battery with high-pressure real density is prepared, which realizes a volume ratio of 2 times that of the conventional graphite anode and 2 Times mass to capacity.