Storage performance of LiFe1 − xMnxPO4 nanoplates (x = 0, 0.5, and 1)

摘要: Although LiFePO4 (LFP) is considered to be a potential cathode material for the lithium-ion batteries, its rate performance significantly restricted by sluggish kinetics of electrons and lithium ions. Several attempts have been made so far improve reducing grain size, doping with aliovalent atoms, coating conductive materials such as carbon or RuO2. We report here synthesis LFP nanoplates solvothermal method, tailoring thickness well coverage at surfaces explore their influence on storage performance. Due fact that Li+ ion diffuses along b-axis, method was aimed control across b-axis. synthesized several various plate thicknesses b-axis; among those, ∼30-nm-thick b-axis having thin (2–5 nm) uniform layer exhibits high capacity performances. Thus, favorable morphology has achieved via fast insertion/extraction compared spherical nanoparticles carbon-coated LFP. Galvanostatic cycling shows 164 ± 5 mAh g−1 0.1 C rate, 100 ± 5 mAh g−1 10 C 46 ± 5 mAh g−1 30 C excellent retention up 50 cycles. Further synthesize LiMnPO4 (LMP) Li(Fe1 − x Mn x )PO4/C (x = 0.5) using method. does not exhibit behavior comparable LiFePO4, mixed systems shown an impressive