Decreasing the Overpotential of Aprotic Li-CO_2 Batteries with the In-Plane Alloy Structure in Ultrathin 2D Ru-Based Nanosheets

Yunhao Wang; Jingwen Zhou; Chao LinBo ChenZhiqiang GuanAmani M. EbrahimGuannan QianChenliang YeLin ChenYiyao GeQinbai YunXixi WangXichen ZhouGang WangKedi LiPengyi LuYangbo MaYuecheng XiongTianshuai WangLong ZhengShengqi ChuYe ChenBin WangChun-Sing LeeYijin LiuQianfan ZhangZhanxi Fan

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Decreasing the Overpotential of Aprotic Li-CO_2 Batteries with the In-Plane Alloy Structure in Ultrathin 2D Ru-Based Nanosheets

机译：Decreasing the Overpotential of Aprotic Li-CO_2 Batteries with the In-Plane Alloy Structure in Ultrathin 2D Ru-Based Nanosheets

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The aprotic Li-CO_2 battery is emerging as a promising energy storagetechnology with the capability of CO_2 fixation and conversion. However, itspractical applications are still impeded by the large overpotential. Herein,the general synthesis of a series of ultrathin 2D Ru-M (M = Co, Ni, and Cu)nanosheets by a facile one-pot solvothermal method is reported. As a proofof-concept application, the representative RuCo nanosheets are used asthe cathode catalysts for Li-CO_2 batteries, which demonstrate a low chargevoltage of 3.74 V, a small overpotential of 0.94 V, and hence a high energyefficiency of 75%. Ex/in situ studies and density functional theory calculationsreveal that the excellent catalytic performance of RuCo nanosheets originatesfrom the enhanced adsorption toward Li and CO_2 during discharge as well asthe elevated electron interaction with Li_2CO_3 during charge by the in-planeRuCo alloy structure. This work indicates the feasibility of boosting the electrochemicalperformance of Li-CO_2 batteries by in-plane metal alloy sites ofultrathin 2D alloy nanomaterials.

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《Advanced functional materials》 |2022年第30期|2202737.1-2202737.11|共11页
作者
Yunhao Wang; Jingwen Zhou; Chao LinBo ChenZhiqiang GuanAmani M. EbrahimGuannan QianChenliang YeLin ChenYiyao GeQinbai YunXixi WangXichen ZhouGang WangKedi LiPengyi LuYangbo MaYuecheng XiongTianshuai WangLong ZhengShengqi ChuYe ChenBin WangChun-Sing LeeYijin LiuQianfan ZhangZhanxi Fan;
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Department of ChemistryCity University of Hong KongHong Kong 999077, China;

School of Materials Science and EngineeringBeihang UniversityBeijing 100191, China;

Department of ChemistryCity University of Hong KongHong Kong 999077, China,Hong Kong Branch of National Precious Metals Material EngineeringResearch Center (NPMM)City University of Hong KongHong Kong 999077, ChinaDepartment of ChemistryCity University of Hong KongHong Kong 999077, China,Center of Super-Diamond and Advanced Films (COSDAF)City University of Hong KongHong Kong 999077, ChinaStanford Synchrotron Radiation Lightsource (SSRL)SLAC National Accelerator LaboratoryMenlo Park, CA 94025, United StatesDepartment of ChemistryTsinghua UniversityBeijing 100084, ChinaDepartment of ChemistryThe Chinese University of Hong KongHong Kong 999077, ChinaBeijing Synchrotron Radiation FacilityInstitute of High Energy PhysicsChinese Academy of SciencesBeijing 100049, ChinaInstitute of Fundamental and Frontiers SciencesUniversity of Electronic Sciences and Technology of ChinaChengdu 611731, ChinaDepartment of ChemistryCity University of Hong KongHong Kong 999077, China,Hong Kong Branch of National Precious Metals Material EngineeringResearch Center (NPMM)City University of Hong KongHong Kong 999077, China,City University of Hong Kong Shenzhen Res;

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正文语种英语
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2D materials; alloy nanosheets; CO_2 conversion; electrocatalysis; Li-CO_2 electrochemistry;

Decreasing the Overpotential of Aprotic Li-CO_2 Batteries with the In-Plane Alloy Structure in Ultrathin 2D Ru-Based Nanosheets

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