One-step growth of the interconnected carbon nanotubes/graphene hybrids from cuttlebone-derived bi-functional catalyst for lithium-ion batteries  

作　　者：Yan Zhong Kuan Deng Jie Zheng Tingting Zhang Peng Liu Xingbin Lv Wen Tian Junyi Ji 

机构地区：[1]School of Chemical Engineering,Sichuan University,Chengdu 610065,China [2]College of Chemistry and Environment,Southwest Minzu University,Chengdu 610041,China [3]State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Journal of Materials Science & Technology》2023年第18期205-213,共9页材料科学技术（英文版）

基　　金：the financially supported from the National Nat-ural Science Foundation of China(Nos.21978178,22008157,and 21776187);the Distinguished Young Scholars for the Natural Science Foundation of Sichuan Province(No.2023NSFSC1915)。

摘　　要：Carbon nanotubes/graphene hybrid materials with excellent physicochemical properties can be widely ap-plied in the fields of energy storage,electrocatalysis,sensing,etc.Reducing the self-stacking and achiev-ing covalent interaction between carbon nanotubes and graphene are important to ensure a stable hi-erarchical architecture and effective mass transfer.Herein,we propose a one-step strategy to synthesize 3D interconnected carbon nanotubes/graphene hybrids on the easy-to-remove biomass-derived substrate.The calcined natural cuttlebone as bi-functional catalyst precursor can simultaneously grow carbon nan-otubes and graphene by one-step chemical vapor deposition without the addition of extra metal catalysts,while the interconnected structure can act as the porous template for graphene growth.The simultane-ous growth process can obtain covalent bonding between carbon nanotubes and graphene,while the crystalline quality and interlayer space can be adjusted by different carbon sources and growth parame-ters(e.g.,temperature).The one-step grown carbon nanotubes/graphene hybrids with seamless interfaces and hierarchical interconnected 3D structure can effectively enhance the electron transfer as well as the electrolyte infiltration efficiency.When utilized as lithium-ion batteries(LIBs)anode,a high specific ca-pacity(544 mAh g^(-1) at 0.1 A g^(-1)),good rate capability(200 mAh g^(-1) at 6.4 A g^(-1) with an ultrashort charge time of 113 s),and excellent cyclic stability can be achieved.This simple and one-step carbon nanotubes/graphene hybrids fabrication strategy can be easily scale-up and applied in various fields.

关 键 词：Cuttlebone biomass Carbon nanotube/graphene hetero-junction Bi-functional catalyst Chemical vapor deposition Lithium-ion batteries 

分 类 号：X705[环境科学与工程—环境工程] TQ424[化学工程] TQ427.26