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Binary superlattice ceramic membrane-coated soft carbon/hard carbon microspheres for high energy mixed-ion batteries
Qilu Univ Technol, Coll Mat Sci & Engn, Shandong Acad Sci, Jinan 250353, Shandong, Peoples R China.
Qilu Univ Technol, Coll Mat Sci & Engn, Shandong Acad Sci, Jinan 250353, Shandong, Peoples R China.
Shandong Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266590, Shandong, Peoples R China.
Qilu Univ Technol, Coll Mat Sci & Engn, Shandong Acad Sci, Jinan 250353, Shandong, Peoples R China.
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2019 (English)In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 438, article id 226980Article in journal (Refereed) Published
Abstract [en]

The assembly of two different materials into a composite with binary superlattices can provide a most efficient and inexpensive path to the synthesis of electrode materials with high energy density. Here, Li9Fe3P8O29/Na2HPO4 binary superlattice ceramic membrane-coated mesoporous soft carbon/hard carbon microspheres (BSLCM-MSC/HCMs) are synthesized via a hydrothermal carbonization method using acyl nucleoside triphosphate disodium salt (Na(2)ATP) as a multifunctional template. Here Na(2)ATP is not only a phosphorus source, a sodium source and a nucleating agent for the rapid synthesis of BSLCM, but also is a carbon source which is easily transformed into MSC/HCMs after being heat-treated in a N-2 atmosphere. This special structure design brings a remarkable synergic effect for both Li+/Na+ mixed-ion storage and transfer kinetics. As a new nanocomposite cathode for mixed-ion batteries (MIBs), the BSLCM-MSC/HCMs display a self-enhancement of discharge capacity via electrolyte penetration in the core-shell mesoporous microspheres. Importantly, the discharge specific energy of a MIB assembled with the BSLCM-MSC/HCMs-2 cathode is up to 400 W h kg(-1) at a high current rate of 10C, which outperforms all lithium-ion batteries and sodium-ion batteries reported so far. The findings in this study may benefit to the development of high energy mixed-ion batteries.

Place, publisher, year, edition, pages
ELSEVIER , 2019. Vol. 438, article id 226980
Keywords [en]
Binary superlattice, Ceramic membrane, Hard carbon, Core-shell mesoporous microsphere, Mixed-ion battery cathode
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-396700DOI: 10.1016/j.jpowsour.2019.226980ISI: 000490030800017OAI: oai:DiVA.org:uu-396700DiVA, id: diva2:1368904
Available from: 2019-11-08 Created: 2019-11-08 Last updated: 2019-11-08Bibliographically approved

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Zhu, Jie-Fang

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