Binary superlattice ceramic membrane-coated soft carbon/hard carbon microspheres for high energy mixed-ion batteries

Zhang, XudongQilu Univ Technol, Coll Mat Sci & Engn, Shandong Acad Sci, Jinan 250353, Shandong, Peoples R China (författare)

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.

Bi, ZhiyingQilu Univ Technol, Coll Mat Sci & Engn, Shandong Acad Sci, Jinan 250353, Shandong, Peoples R China (författare)
Xu, GuogangShandong Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266590, Shandong, Peoples R China (författare)
Li, ChanggangQilu Univ Technol, Coll Mat Sci & Engn, Shandong Acad Sci, Jinan 250353, Shandong, Peoples R China (författare)
He, WenQilu Univ Technol, Coll Mat Sci & Engn, Shandong Acad Sci, Jinan 250353, Shandong, Peoples R China (författare)
Zhu, Jie-FangUppsala universitet,Strukturkemi(Swepub:uu)zhuji179 (författare)
Qilu Univ Technol, Coll Mat Sci & Engn, Shandong Acad Sci, Jinan 250353, Shandong, Peoples R ChinaShandong Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266590, Shandong, Peoples R China (creator_code:org_t)

Av författaren/redakt...: Zhang, Xudong; Bi, Zhiying; Xu, Guogang; Li, Changgang; He, Wen; Zhu, Jie-Fang

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