Journal
NANOSCALE RESEARCH LETTERS
Volume 11, Issue -, Pages -Publisher
SPRINGEROPEN
DOI: 10.1186/s11671-016-1483-9
Keywords
Nanoparticle; Graphene; Rate capability; Cathode; Li battery; Composition
Funding
- Basic Science Research Program through National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2014R1A2A2A01003542]
- National Strategic R&D Program for Industrial Technology - Ministry of Trade, Industry and Energy (MOTIE) [10043868]
- National Research Foundation of Korea [2014R1A2A2A01003542] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this article, we report a facile approach to enhance the electrochemical performance of Li-rich oxides with vulnerable phase stability. The Li-rich oxide nanoparticles were attached to the surface of graphene; the graphene surface acted as a matrix with high electronic conductivity that compensated for the low conductivity and enhanced the rate capability of the oxides. Our novel approach constitutes a direct assembly of two materials via electrostatic interaction, without a high-temperature heat treatment. The inevitable deterioration in phase integrity of previous composites between carbon and Li-rich oxides resulted from the reaction of oxygen in the structure with carbon during the heat-treatment process. However, our new method successfully attached Li-rich nanoparticles to the surface of graphene, without a phase change of the oxides. The resulting graphene/Li-rich oxide composites exhibited superior capacity and rate capability compared to their pristine Li-rich counterparts.
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