DataVXACS NanoPaper
journal article·2022-09-27

Germanium Nanowires via Molten-Salt Electrolysis for Lithium Battery Anode

Huan Liu, Tianhao Wu, Liqiang Zhang, Xin Wang, Haifeng Li, Shiqi Liu, Qi Zhang, Xu Zhang, Haijun Yu

ACS Nano· Volume 16· Issue 9
Publisher page
Source abstract

Abstract

Germanium (Ge)-based materials can serve as promising anode candidates for high-energy lithium-ion batteries (LIBs). However, the rapid capacity decay caused by huge volume expansion severely retards their application. Herein, we report a facile and controllable synthesis of Ge nanowire anode materials through molten-salt electrolysis. The optimal Ge nanowires can deliver a capacity of 1058.9 mAh g–1 at 300 mA g–1 and a capacity above 602.5 mAh g–1 at 3000 mA g–1 for 900 cycles. By in situ transmission electron microscopy and in situ X-ray diffraction, the multiple-step phase transformation and good structural reversibility of the Ge nanowires during charge/discharge are elucidated. When coupled with a lithium-rich Li1.2Mn0.567Ni0.167Co0.067O2 cathode in a full battery, the Ge nanowire anode leads to a relatively stable capacity with a retention of 84.5% over 100 cycles. This research highlights the significance of molten-salt electrolysis for the synthesis of alloy-type anode materials toward high-energy LIBs.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storageMetals & alloysNanomaterials

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Molten salt chemistry and electrochemical processes

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

Affiliations

Institute of Advanced Battery Materials and Devices, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, People’s Republic of China

Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, 100124, People’s Republic of China

Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, People’s Republic of China

Department of Materials Science and Engineering, China University of Petroleum, Beijing Changping, 102249, People’s Republic of China

Funding

Natural Science Foundation of Beijing Municipality · National Natural Science Foundation of China · Beijing Science and Technology Innovation Fund · Youth Beijing Scholars program

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