Comprehensive Enhancement of Nanostructured Lithium-Ion Battery Cathode Materials via Conformal Graphene Dispersion
| Autor: | Chris Wolverton, Qianqian Li, Norman S. Luu, Ethan B. Secor, Itamar Balla, Koichi Hamamoto, Jun Lu, Linda M. Guiney, Rui Xu, Scott A. Barnett, Xiankai Yu, Vinod K. Sangwan, Jinsong Wu, Khalil Amine, Weiwei Liu, Soo Kim, Kan Sheng Chen, Jung Woo T. Seo, Vinayak P. Dravid, Mark C. Hersam |
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| Rok vydání: | 2017 |
| Předmět: |
Battery (electricity)
Materials science Graphene Mechanical Engineering Nanoparticle Bioengineering Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Lithium-ion battery Cathode 0104 chemical sciences law.invention law Electrode General Materials Science Electronics 0210 nano-technology Efficient energy use |
| Zdroj: | Nano letters. 17(4) |
| ISSN: | 1530-6992 |
| Popis: | Efficient energy storage systems based on lithium-ion batteries represent a critical technology across many sectors including consumer electronics, electrified transportation, and a smart grid accommodating intermittent renewable energy sources. Nanostructured electrode materials present compelling opportunities for high-performance lithium-ion batteries, but inherent problems related to the high surface area to volume ratios at the nanometer-scale have impeded their adoption for commercial applications. Here, we demonstrate a materials and processing platform that realizes high-performance nanostructured lithium manganese oxide (nano-LMO) spinel cathodes with conformal graphene coatings as a conductive additive. The resulting nanostructured composite cathodes concurrently resolve multiple problems that have plagued nanoparticle-based lithium-ion battery electrodes including low packing density, high additive content, and poor cycling stability. Moreover, this strategy enhances the intrinsic advantages of nano-LMO, resulting in extraordinary rate capability and low temperature performance. With 75% capacity retention at a 20C cycling rate at room temperature and nearly full capacity retention at -20 °C, this work advances lithium-ion battery technology into unprecedented regimes of operation. |
| Databáze: | OpenAIRE |
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