journal article·2023-06-09

Charge-Transfer Complex-Based Artificial Layers for Stable and Efficient Zn Metal Anodes

Peixun Xiong, Chuyuan Lin, Ying Wei, Jung-Hui Kim, Gun Jang, Keren Dai, Lingxing Zeng, Shuping Huang, Seok Joon Kwon, Sang-Young Lee, Ho Seok Park

ACS Energy Letters· Volume 8· Issue 6
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Abstract

Herein, we report a charge-transfer complex electrolyte additive, 7,7,8,8-tetracyanoquinodimethane (TCNQ), with high Zn affinity, which was tightly adsorbed on the surface of a Zn anode to form a dense and robust interfacial complex layer and suppress the activity of H 2 O. As verified by comprehensive experimental and computational analyses, this complex layer could construct a Zn–Zn(TCNQ) 2 Ohmic contact interface, guide rapid ion/electron transport, ameliorate electric field distribution, and inhibit the direct contact between the active H 2 O and Zn anode, demonstrating a dendrite-free Zn anode and facile Zn plating/stripping kinetics. Consequently, the Zn||Zn symmetrical cell exhibits a high Zn plating/stripping reversibility of over 1000 h at 20 mA cm –2 and 5 mA h cm –2 and a high depth of discharge (43%). Moreover, the Zn||MnO 2 full cell delivers a high capacity of 143.3 mA h g –1 at 2000 mA g –1 even after 4000 cycles and a capacity retention of 94.7% after returning to 100 mA g –1 .
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Research context

OpenAlex topics: Advanced battery technologies research · Perovskite Materials and Applications · Supercapacitor Materials and Fabrication

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemical Engineering, Sungkyunkwan University, Suwon-si, Gyeonggi-do 16419, Republic of Korea

Engineering Research Center of Polymer Green Recycling of Ministry of Education, College of Environmental Science and Engineering, Fujian Normal University, Shangsan Road No. 8, Fuzhou 350007, People’s Republic of China

College of Chemistry, Fuzhou University, Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou, Fujian 350108, People’s Republic of China

Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120749, Republic of Korea

ZNDY of Ministerial Key Laboratory, School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China

SKKU Advanced Institute of Nanotechnology (SAINT), SKKU Institute of Energy Science and Technology (SIEST), College of Engineering & Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology (SAIHST), Sungkyunkwan University, Suwon-si, Gyeonggi-do 16419, Republic of Korea

Funding

Sungkyunkwan University · National Research Foundation of Korea

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