DataVXACS Energy LettersPaper
journal article·2023-07-14

A Kinetic Indicator of Ultrafast Nickel-Rich Layered Oxide Cathodes

Jian Wang, Hyejeong Hyun, Sungjae Seo, Kyeongjae Jeong, Jeongwoo Han, Sugeun Jo, Hwiho Kim, Bonho Koo, Donggun Eum, Juwon Kim, Jinkyu Chung, Hoon-Hwe Cho, Heung Nam Han, Tae Joo Shin, Meng Ni, Kisuk Kang, Jongwoo Lim

ACS Energy Letters· Volume 8· Issue 7
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Source abstract

Abstract

Elucidating high-rate cycling-induced nonequilibrium electrode reactions is crucial for developing extreme fast charging (XFC) batteries. Herein, we unveiled the distinct rate capabilities of a series of Ni-rich layered oxide (NRLO) cathodes by quantitatively establishing their dynamic structure–kinetics relationships. Contrary to conventional views, we discovered electrode kinetic properties obtained ex-situ near equilibrium states failed to assess the effective rate capability of NRLOs at ultrafast C rates. Further, the kinetic phase heterogeneity, characterized by the dynamic separations in in-situ X-ray diffraction patterns and deviations in NRLO c -axis lattice parameters, exclusively correlated with the capacity reduction under XFC and became an effective indicator of the NRLO rate capability. Enhancing the cycling temperature boosted the rate capability of studied NRLOs by ∼10%, which was further verified to mitigate the kinetic phase heterogeneity during XFC. Overall, this study lays the groundwork for tuning the kinetic phase heterogeneity of electrodes to develop ultrafast batteries.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

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

School of Energy and Environment, City University of Hong Kong, Hong Kong SAR 999077, China

Department of Chemistry, College of Science, Seoul National University, Seoul 08826, Republic of Korea

Department of Materials Science and Engineering & Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea

Center for Analytical Sciences, LG Energy Solution, Ltd., 188, Munji-ro, Yuseong-gu, Dajeon 34122, Republic of Korea

Department of Materials Science and Engineering, Hanbat National University, Daejeon 34158, Republic of Korea

UNIST Central Research Facilities & School of Natural Science, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea

Department of Building and Real Estate, The Hong Kong Polytechnic University, Hong Kong SAR 999077, China

Funding

National Research Foundation of Korea · City University of Hong Kong

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