Chengxu Shen - Academia.edu (original) (raw)
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Papers by Chengxu Shen
RSC Advances, 2018
A different evaluation strategy is introduced to understand the effect of electrochemical prelith... more A different evaluation strategy is introduced to understand the effect of electrochemical prelithiation behaviours through a facile electrochemical data analysis.
Journal of Alloys and Compounds, 2018
SiO x due to their high theoretical specific capacity and moderate volume expansion, have been co... more SiO x due to their high theoretical specific capacity and moderate volume expansion, have been considered as alternative anode materials for next-generation Li-ion batteries. However, the electronic isolate effect originated from the huge volume variation during the repeated cycling processes results in poor cycling performance and low reversible capacity, as well as inferior rate performance. Here, we report a facile and catalyst-free synthetic route to prepare carbon coated Si nanowires connected SiO x anode materials which is supposed to address these problems. Micrometer-sized Si nanowires in-situ grow on the surface of micro-SiO at optimized temperature without catalyst assistance, following a CVD process for carbon coating. The carbon coated Si nanowires not only act as electrochemical active materials, but also efficiently accommodate the electronic isolate effect of micro-SiO particles, thus remarkably improving the electrochemical performance. As a result, the carbon coated Si nanowires connected SiO x anode exhibits high reversible capacity of~750 and 617.5 mAh g À1 at 0.5C and 1C (1C ¼ 1500 mA g À1), respectively. Meanwhile, an ultrahigh capacity retention of >92% after 300 cycles is achieved at a high area mass loading of 1.8 mg cm À2 .
Electrochimica Acta, 2018
Surface oxofunctionalized hard carbon spheres enabled superior high-rate capability and long-cycl... more Surface oxofunctionalized hard carbon spheres enabled superior high-rate capability and long-cycle stability for Liion storage,
RSC Advances, 2017
3D porous networks are subject to be destroyed during electrode preparation. Structure-preserved ... more 3D porous networks are subject to be destroyed during electrode preparation. Structure-preserved 3D porous Si/rGO anode materials were synthesized by tuning pore size distribution and performed superior electrochemical properties.
Advanced Materials Interfaces
Nanoscale, 2020
Morphologies-controlled MoS2 deposited by low temperature ALD exhibit tunable optical properties.
RSC Advances, 2018
A different evaluation strategy is introduced to understand the effect of electrochemical prelith... more A different evaluation strategy is introduced to understand the effect of electrochemical prelithiation behaviours through a facile electrochemical data analysis.
Journal of Alloys and Compounds, 2018
SiO x due to their high theoretical specific capacity and moderate volume expansion, have been co... more SiO x due to their high theoretical specific capacity and moderate volume expansion, have been considered as alternative anode materials for next-generation Li-ion batteries. However, the electronic isolate effect originated from the huge volume variation during the repeated cycling processes results in poor cycling performance and low reversible capacity, as well as inferior rate performance. Here, we report a facile and catalyst-free synthetic route to prepare carbon coated Si nanowires connected SiO x anode materials which is supposed to address these problems. Micrometer-sized Si nanowires in-situ grow on the surface of micro-SiO at optimized temperature without catalyst assistance, following a CVD process for carbon coating. The carbon coated Si nanowires not only act as electrochemical active materials, but also efficiently accommodate the electronic isolate effect of micro-SiO particles, thus remarkably improving the electrochemical performance. As a result, the carbon coated Si nanowires connected SiO x anode exhibits high reversible capacity of~750 and 617.5 mAh g À1 at 0.5C and 1C (1C ¼ 1500 mA g À1), respectively. Meanwhile, an ultrahigh capacity retention of >92% after 300 cycles is achieved at a high area mass loading of 1.8 mg cm À2 .
Electrochimica Acta, 2018
Surface oxofunctionalized hard carbon spheres enabled superior high-rate capability and long-cycl... more Surface oxofunctionalized hard carbon spheres enabled superior high-rate capability and long-cycle stability for Liion storage,
RSC Advances, 2017
3D porous networks are subject to be destroyed during electrode preparation. Structure-preserved ... more 3D porous networks are subject to be destroyed during electrode preparation. Structure-preserved 3D porous Si/rGO anode materials were synthesized by tuning pore size distribution and performed superior electrochemical properties.
Advanced Materials Interfaces
Nanoscale, 2020
Morphologies-controlled MoS2 deposited by low temperature ALD exhibit tunable optical properties.