DataVXChemistry of MaterialsPaper
journal article·2016-11-22

Tuning the Carbon Crystallinity for Highly Stable Li–O2 Batteries

Youngjoon Bae, Young Soo Yun, Hee-Dae Lim, Hongkyung Lee, Yun-Jung Kim, Jinsoo Kim, Hyeokjun Park, Youngmin Ko, Sungho Lee, Hyuk Jae Kwon, Hyunjin Kim, Hee-Tak Kim, Dongmin Im, Kisuk Kang

Chemistry of Materials· Volume 28· Issue 22
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Source abstract

Abstract

The Li-O-2 battery is capable of delivering the highest energy density among currently known battery chemistries and is thus regarded as one of the most promising candidates for emerging high-energy-density applications such as electric vehicles. Although much progress has been made in the past decade in understanding the reaction chemistry of this battery system, many issues must be resolved regarding the active components, including the air electrode and electrolyte, to overcome the presently insufficient cycle life. In this work, we demonstrate that the degradation kinetics of both the air electrode and electrolyte during cycles can be significantly retarded through control of the crystallinity of the carbon electrode, the most frequently used air electrode in current Li-O-2 batteries. Using C-13-based air electrodes with various degrees of graphitic crystallinity and in situ differential electrochemical mass spectroscopy analysis, it is demonstrated that, as the crystallinity increases in the carbon, the CO2 evolution from the cell is significantly reduced, which leads to a 3-fold enhancement in the cyclic stability of the cell.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced Battery Technologies Research

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

Affiliations

Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea

Department of Chemical Engineering, Kangwon National University, Samcheok 245-711, Republic of Korea

Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea

Carbon Convergence Materials Research Center, Korea Institute of Science and Technology, San 101 Enha-ri, Bongdong-eup, Wanju-gun 565-905, Republic of Korea

Energy Material Lab, Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Yeongtong-gu, Suwon, Gyeonggi-do 16678, Republic of Korea

Funding

Samsung · National Research Foundation of Korea · Ministry of Trade, Industry and Energy · Korea Institute of Energy Technology Evaluation and Planning

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