Carbon wrapped hierarchical Li3V2(PO4)3 microspheres for high performance lithium ion batteries.

Abstract:

:Nanomaterials are extensively studied in electrochemical energy storage and conversion systems because of their structural advantages. However, their volumetric energy density still needs improvement due to the high surface area, especially the carbon based nanocomposites. Constructing hierarchical micro-scaled materials from closely stacked subunits is proposed as an effective way to solve the problem. In this work, Li3V2(PO4)3@carbon hierarchical microspheres are prepared by a solvothermal reaction and subsequent annealing. Hierarchical Li3V2(PO4)3 structures with different subunits are obtained with the aid of polyvinyl pyrrolidone (PVP). Moreover, excessive PVP interconnect and form PVP-based hydrogels, which later convert into conductive carbon layer on the surface of Li3V2(PO4)3 microspheres during the annealing process. As a cathode material for lithium ion batteries, the 3D carbon wrapped Li3V2(PO4)3 hierarchical microspheres exhibit high rate capability and excellent cycling stability. The electrode has the capacity retention of 80% after 5000 cycles even at 50C.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Liang S,Tan Q,Xiong W,Tang Y,Tan X,Huang L,Pan A,Cao G

doi

10.1038/srep33682

subject

Has Abstract

pub_date

2016-09-21 00:00:00

pages

33682

issn

2045-2322

pii

srep33682

journal_volume

6

pub_type

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