Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 16, Pages 5922-5927Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00210e
Keywords
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Funding
- Advanced Technology Center (ATC) Program [10035919]
- Ministry of Trade, Industry & Energy (MI, Korea)
- World Premier Materials grant
- Korea government Ministry of Trade, Industry and Energy
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20124010203320]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20124010203320] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Because of the on-going miniaturization of devices powered by lithium-ion batteries, the realization of a high tap density that sustains a high power output is crucial to enhancing the low intrinsic volumetric energy density of LiFePO4 (LFP), one of the most extensively studied cathode materials. To increase the tap density of LFP, we report a synthetic method that allows microscale size control of a LiFePO4 precursor with a mesoporous structure based on changes in the chemical potential and nucleation and growth rates by surfactant addition. The carbon-coated LiFePO4 particles prepared from the precursors had diameters and tap densities in the range of 3-7 mu m and 1.3-1.5 g cm(-3), respectively, depending on the surfactant concentration. The particles exhibited negligible antisite defects (approximately 2%) and showed a high volumetric capacity of approximately 190 mA h cm(-3) at a 0.1 C-rate and an excellent rate performance of 80 mA h g(-1) at a 30 C-rate.
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