Rescaling of metal oxide nanocrystals for energy storage having high capacitance and energy density with robust cycle life

Journal Article · Mon Jun 15 00:00:00 EDT 2015 · Proceedings of the National Academy of Sciences of the United States of America

DOI:https://doi.org/10.1073/pnas.1503546112· OSTI ID:1235143

Jeong, Hyung Mo ^[1]; Choi, Kyung Min ^[1]; Cheng, Tao ^[2]; Lee, Dong Ki ^[1]; Zhou, Renjia ^[3]; Ock, Il Woo ^[4]; Milliron, Delia J. ^[5]; Goddard, III, William A. ^[2]; Kang, Jeung Ku ^[6]

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1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea,
2. Materials and Process Simulation Center, California Institute of Technology, Pasadena, CA 91125,
3. Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,
4. Graduate School of Energy, Environment, Water and Sustainability, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea,
5. Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Department of Chemical Engineering, University of Texas at Austin, Austin, TX 78712
6. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea,, Graduate School of Energy, Environment, Water and Sustainability, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea,

Significance The combined study of experiments and molecular dynamics simulations demonstrates that metal oxide nanocrystals on graphene can be rescaled into atomic clusters. It is notable that the capacitance of 3,023 F per the mass of NiO, matching the measured capacitance of 2,231 per the total electrode mass, exceeds the theoretical gravimetric capacitance of 2,618 F available via ion-to-atom redox reactions. This approach thus provides a new pathway to realize full capacitance via ion-to-atom Faradaic redox reactions. Furthermore, assembly with a rescaled metal oxide positive electrode shows that further development of high-capacity negative counter electrode materials can pave a new route to address challenging energy storage issues.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1235143
• Journal Information: Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Vol. 112 Journal Issue: 26; ISSN 0027-8424
• Publisher: Proceedings of the National Academy of Sciences
• Country of Publication: United States
• Language: English