Alloy/layer double hydroxide interphasic synergy via nano-heterointerfacing for highly reversible CO_(2)redox reaction in Li-CO_(2)batteries  

作　　者：Tianzhen Jian Wenqing Ma Jiagang Hou Jianping Ma Xianhong Li Haiyang Gao Caixia Xu Hong Liu 

机构地区：[1]Institute for Advanced Interdisciplinary Research(iAIR),Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong,School of Chemistry and Chemical Engineering,University of Jinan,Jinan 250022,China [2]Kyiv College at Qilu University of Technology,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China [3]State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China [4]Shandong Sacred Sun Power Sources Co.,Ltd.,Qufu 273100,China

出　　处：《Nano Research》2024年第6期5206-5215,共10页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(No.52201254);the Natural Science Foundation of Shandong Province(Nos.ZR2020QE012,ZR2020MB090,ZR2023ME155,and ZR2023ME085);the project of“20 Items of University”of Jinan(No.202228046);the Taishan Scholar Project of Shandong Province(No.tsqn202306226).

摘　　要：Li-CO_(2)batteries are among the most intriguing techniques for balancing the carbon cycle,but are challenged by the annoyed thermodynamic barrier of the Li_(2)CO_(3)decomposition reaction.Herein,we demonstrate the electrocatalytic performances of two-dimensional(2D)CoAl-layer double hydroxide(LDH)nanosheets can be significantly improved by trans-dimensional crosslinking with three-dimensional(3D)multilevel nanoporous(MP)-RuCoAl alloy(MP-RuCoAl alloy⊥CoAl-LDH).The MP-RuCoAl alloy⊥CoAl-LDH with multiscale pore channels and abundant nano-heterointerface is directly prepared by controllable etching Al from a Ru-Co-Al master alloy along with simultaneous partial oxidization of Al and Co atoms.The MP-RuCoAl is composed of various intermetallic compounds and Ru with abundant grain boundaries,and forms numerous heterointerface with 2D CoAl-LDH nanosheets.The multiscale porous metallic network benefits mass and electron transportation as well as discharge product storage and enables a rich multiphase reaction interface.In situ differential electrochemical mass spectrometry shows that the mass-to-charge ratio in the charging process is~0.733 which is consistent with the theoretical value of 3/4,stating that the reversible co-decomposition of Li_(2)CO_(3)and C can be achieved with the MP-RuCoAl alloy⊥CoAl-LDH.The Ketjen black(KB)/MP-RuCoAl⊥CoAl-LDH battery demonstrates a high cyclability for over 2270 h(227 cycles)with a lower voltage gap stabilized at~1.3 V at 200 mA·g^(−1).Our findings here provide useful guidelines for developing high efficiency transition metal based electrocatalysts by coupling with conductive porous substrate for impelling the development of practical Li-CO_(2)battery systems.

关 键 词：heterojunction interface NANOPOROUS Li-CO_(2)battery DEALLOYING 

分 类 号：TM912[电气工程—电力电子与电力传动]