Abstract
A LiMn0.6Fe0.4PO4/CA composite with a high tap density and superior electronic conductivity is synthesized by a combination of wet ball-milling, spray drying, and carbothermal reduction with Carbon aerogel (CA) as a carbon additive. CA is a porous nanomaterial with a very large specific surface area. There are 3D network structure between the primary particles of LiMn0.6Fe0.4PO4 when CA is used for carbon coating. This 3D network structure not only is beneficial for the improvement of electronic conductivity but also can absorb a large amount of electrolyte, which helps to improve the Li+ exchange rate between the electrode and electrolyte. More attention, we found that the primary particles of LiMn0.6Fe0.4PO4 coated with CA were more compact than those coated without CA, which greatly improved the tap density of the material. Thus the LiMn0.6Fe0.4PO4/CA composite with appropriate amount of CA exhibits a high tap density of 1.6 g cm−3 and excellent electronic conductivity of 8.5 × 10−2 S cm−1 simultaneously. Resulting in a high volumetric energy density of 856.1 Wh L−1 at 1 C rate, and discharge capacity of 159.1 mAh g−1 at 0.2 C.
Funder
Natural Science Foundation of Hebei Province
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials
Cited by
13 articles.
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