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Nonstoichiometric silicon oxide (SiO  x  ) with high theoretical capacity is a promising anode material for lithium-ion batteries (LIBs). However, volume changes and poor electronic conductivity of SiO  x  are major impediments to its practical application. The modification of SiO  x  with carbonaceous materials to accommodate volume variations and improve conductivity is a valuable strategy. Nanonetwork-structured (NNS) carbons have been paid great attention because of their unique three-dimensional structure, and high electronic and ionic conductivity. Incorporating SiO  x  with well-designed NNS carbons is a promising method to prepare high quality electrode materials for lithium-ion batteries. In this work, a fabrication approach is developed to synthesize a 3D carbon network composed of carbonaceous hybrid nanotubes with well-dispersed SiO  x  nanodomains (CNT@SiO  x  -C) from 1D gelable bottlebrushes as network building blocks based on molecular-scale interface engineering technology. Herein, nano-sized SiO  x  particles are embedded into the carbonaceous matrix to prevent their volume change during cycling. The experimental results indicated that the CNT@SiO  x  -C presents high reversible capacity, remarkable cycle life and high rate capability due to the high dispersion of nano-sized SiO  x  and conductive 3D carbon nanonetwork.

Construction of 3D carbon networks with well-dispersed SiOx nanodomains from gelable building blocks for lithium-ion batteries

Construction of 3D carbon networks with well-dispersed SiO_x nanodomains from gelable building blocks for lithium-ion batteries