DataVXAdvanced Energy MaterialsPaper
journal article·2020-07

Nonwoven rGO Fiber‐Aramid Separator for High‐Speed Charging and Discharging of Li Metal Anode

Yong Jun Gong, Jung Woon Heo, Hakji Lee, Hyunjin Kim, Jinil Cho, Seonmi Pyo, Heejun Yun, Heebae Kim, Sang Yoon Park, Jeeyoung Yoo, Youn Sang Kim

Advanced Energy Materials· Volume 10· Issue 27
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Source abstract

Abstract

Abstract Li metal, which has a high theoretical specific capacity and low redox potential, is considered to the most promising anode material for next‐generation Li ion‐based batteries. However, it also exhibits a disadvantageous solid electrolyte interphase (SEI) layer problem that needs to be resolved. Herein, an advanced separator composed of reduced graphene oxide fiber attached to aramid paper (rGOF‐A) is introduced. When rGOF‐A is applied, F− anions, generated from the decomposition of the LiPF6 electrolyte during the SEI layer formation process form semi‐ionic CF bonds along the surface of rGOF. As Li+ ions are plated, the “F‐doped” rGO surface induces the formation of LiF, which is known as a component of a chemically stable SEI, therefore it helps the Li metal anode to operate stably at a high current of 20 mA cm−2 with a high capacity of 20 mAh cm−2. The proposed rGOF‐A separator successfully achieves a stable SEI layer that could resolve the interfacial issues of the Li metal anode.
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Research context

Energy storageNanomaterials

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication

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

Affiliations

Program in Nano Science and Technology Graduate School of Convergence Science and Technology Seoul National University Gwanak‐ro 1, Gwanak‐gu Seoul 08826 Republic of Korea

Advanced Institute of Convergence Technology Gwanggyo‐ro 145, Yeongtong‐gu Suwon 16229 Republic of Korea

Korea Research Institute of Chemical Technology 141 Gajeong‐ro Yuseong‐gu 34114 Republic of Korea

Department of School of Energy Engineering Kyungpook National University Daehak‐ro 80, Buk‐gu Daegu 41566 Republic of Korea

School of Chemical and Biological Engineering College of Engineering Seoul National University Gwanak‐ro 1, Gwanak‐gu Seoul 08826 Republic of Korea

Funding

National Research Foundation of Korea · Ministry of Science, ICT and Future Planning

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