摘要
Nanoporous （NP） Si/Cu composites are fabricated by means of alloy refining followed by facile electroless deaUoying in mild conditions. NP-SidCu composites with a three-dimensional porous network nanoarchitecture with different Cu contents are obtained by changing the feeding ratio of alloy precursors. Owing to the rich porosity and integration of conductive Cu into a nanoporous Si backbone, the NP-Si^Cu15 composite exhibits modified conductivity and reduced volumetric expansion/fracture during repeated charging-discharging processes in lithium-ion batteries （LIBs）, thus exhibiting much higher cycling reversibility than NP-Si92Cu8 and pure NP-Si. With the advantages of unique performance and easy preparation, NP-Si/Cu composite has potential for application as an advanced anode material for LIBs.
Nanoporous （NP） Si/Cu composites are fabricated by means of alloy refining followed by facile electroless deaUoying in mild conditions. NP-SidCu composites with a three-dimensional porous network nanoarchitecture with different Cu contents are obtained by changing the feeding ratio of alloy precursors. Owing to the rich porosity and integration of conductive Cu into a nanoporous Si backbone, the NP-Si^Cu15 composite exhibits modified conductivity and reduced volumetric expansion/fracture during repeated charging-discharging processes in lithium-ion batteries （LIBs）, thus exhibiting much higher cycling reversibility than NP-Si92Cu8 and pure NP-Si. With the advantages of unique performance and easy preparation, NP-Si/Cu composite has potential for application as an advanced anode material for LIBs.
基金
The authors would like to express their sincere gratitude to Prof. Xiangfa Liu, Prof. Yuying Wu, and the key laboratory for liquid-solid structural evolution and processing of materials （Ministry of Education, Shandong University）. This work was also supported by the National Natural Science Foundation of China （Nos. 21401074 and 21271085） and the Natural Science Foundation of Shandong Province （No. ZR2014BP013）.
