sp^(3)-like defect structure of hetero graphene-carbon nanotubes for promoting carrier transfer and stability

Three-dimensional(3 D) hybrid of nanocarbons is a very promising way to the high-performance design of electrocatalysis materials.However,sp^(3)-like defect structure,a combination of high strength and conduction of graphene and carbon nanotubes(CNTs) is rarely reported.Herein,3 D neural-like hybrids of graphene(from reduced graphene oxide) and carbon nanotubes(CNTs) have been integrated via sp^(3)-like defect structure by a hydrothermal approach.The sp^(3)-like defect structure endows 3 D nanocarbon hybrids with an enhanced carrier transfer,high structural stability,and electrocatalytic durability.The neural-like structure is shown to demonstrate a cascade effect of charges and significant performances regarding bio-electrocatalysis and lithium-sulfur energy storage.The concept and mechanism of "sp^(3)-like defect structure" are proposed at an atomic/nanoscale to clarify the generation of rational structure as well as the cascade electron transfer.

Comprehensive insights and perspectives into the recent progress of electrode materials for non-aqueous K-ion battery

Nowadays,research work on new sustainable clean energy with high-performance,richer resources,safe and reliable are concerned for technological advancement.Due to potassium’s abundant reserves and similar properties with lithium,the K-ion battery has good application prospects,and becomes one of the new current research directions in the post Li-ion battery current energy field.Here,a comprehensive review of the recent research progress in electrode materials for non-aqueous K-ion battery was summarized,including the design strategies and modification methods,the electrochemical properties(specific capacity,cycle life,rate performance)as well as the K-storage mechanism of anode/cathode electrode.Also,the valuable insight of constructing high-performance non-aqueous K-ion battery electrode materials was provided.Finally,the research challenges and development directions of nonaqueous K-ion battery were discussed.This review can offer some useful guidelines for the design,synthesis and further practical application of electrode materials for non-aqueous K-ion battery.