journal article·2024-09-13

Ultrathin K–C Composite Anode Enables Conformal Stripping/Plating for Dendrite-Free and High-Rate Potassium-Metal Batteries

Zixing Wang, Jian-Fang Wu, Wang Zhou, Ying Mo, Shi Chen, Tongyu Zhou, Wenzhuo Shen, Bohua Ren, Peifeng Huang, Jilei Liu

ACS Energy Letters· Volume 9· Issue 9
Publisher page

Abstract

The development of metallic K is seriously hampered by low melting point, high reactivity, and uncontrollable dendrite growth. Herein, benefiting from the super-potassiophility of CNTs (carbon nanotubes), K@CNT composite anodes are prepared via a rational fused-modeling approach, where CNTs build interconnected frameworks and K atoms are anchored on CNTs, inducing depressed atomic creeping and flowability at high temperatures. Thereby, K@CNT composite anodes deliver flexibility, processability (∼30 μm), and thermal stability (up to 300 °C). In particular, K@CNT composite anodes exhibit a conformal stripping and plating behavior along with the plane-structure of the CNT framework during charge–discharge processes under 10 mA cm –2 without dendrites. Moreover, the K@CNT // Prussian white full cells exhibit high rate performance (60.9 mAh g –1 at 3000 mA g –1 ), high energy density (187.3 Wh kg –1 ), and high-temperature stability. This work provides an avenue for designing high-performance metallic K anodes and for driving the commercialization of K-metal batteries.
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Research context

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced battery technologies research

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

Affiliations

College of Materials Science and Engineering, Hunan Joint International Laboratory of Advanced Materials and Technology of Clean Energy, Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China

Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau 999078, China

State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China

Department of Electronic Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China

Funding

Natural Science Foundation of Hunan Province · National Key Research and Development Program of China · Fundo para o Desenvolvimento das Ci?ncias e da Tecnologia · National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province

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