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- W2009579578 abstract "By using a multifunctional high-energy biomolecule—adenosine triphosphate (ATP)—we fabricated high-energy quantum dots (HEQDs) with a feature size of less than 10 nm and used them in high-power lithium-ion batteries. We introduced high-energy phosphate bonds into the crystal structure of LiFePO4 nanoparticles and synthesized the mesoporous biocarbon nanowire coated LiFePO4 with HEQDs (MBCNW-LFP-HEQDs) by using ATP as a phosphorus source, a nucleating agent, a structural template and a biocarbon source. HEGDs were homogeneously formed inside the ultra-thin LiFePO4 nanosheet and the mesoporous biocarbon nanowire network structure was coated on the surface of the nanosheet. In LiFePO4 nanoparticles, HEQDs result in more storage sites of Li+ ions and easier transfer kinetics of electrons and lithium ions, where the kinetic transformation path between LiFePO4 and FePO4 is rather different from the path deduced from its equilibrium phase diagram. Compared to the usual LiFePO4 nanoparticle (10–100 nm) cathode, the MBCNW-LFP-HEQD cathode shows the best first discharge capacity of 197 mA h g−1 at the 0.1 C rate, which is higher than the theoretical capacity of LiFePO4 (170 mA h g−1). After 100 cycles at varied current rates: 0.1, 0.5, 1, 5 and 10 C, this cathode still delivered a high discharge capacity of 180 mA h g−1 and an ultra-high coulombic efficiency close to 100%. This is attributed to the quantum tunneling of HEQDs in LiFePO4 nanoparticles and better percolation of mesoporous biocarbon nanowire coating network structures. This work is instructive for fabrication and design of new types of electrochemical energy conversion and storage devices with extraordinary properties and functions." @default.
- W2009579578 created "2016-06-24" @default.
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- W2009579578 date "2014-03-11" @default.
- W2009579578 modified "2023-10-12" @default.
- W2009579578 title "Fabricating high-energy quantum dots in ultra-thin LiFePO<sub>4</sub>nanosheets using a multifunctional high-energy biomolecule—ATP" @default.
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- W2009579578 doi "https://doi.org/10.1039/c3ee44187c" @default.
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