期刊
NANO LETTERS
卷 17, 期 4, 页码 2539-2546出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b00274
关键词
Lithium manganese oxide; spinel; nanoparticle; high packing density; high rate capability; low temperature
类别
资金
- Center for Electrochemical Energy Science, an Energy Frontier Research Center - US Department of Energy, Office of Science, Basic Energy Sciences [DE-AC02-06CH11357]
- Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource [NSF NNCI-1542205]
- MRSEC program [NSF DMR-1121262]
- International Institute for Nanotechnology (IN)
- Keck Foundation
- State of Illinois
- NASA Ames Research Center [NNA06CB93G]
- Office of Science of the United States Department of Energy [DE-AC02-05CH11231]
- Office of the Provost
- Office for Research
- Northwestern University Information Technology
- Northwestern University-Argonne Institute of Science and Engineering (NAISE)
- JSPS Program for Advancing Strategic International Networks
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 degrees C, this work advances lithium-ion battery technology into unprecedented regimes of operation.
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