TY  - JOUR
AU  - Yu, Shicheng
AU  - Mertens, Andreas
AU  - Tempel, Hermann
AU  - Eichel, Rüdiger-A.
AU  - Kungl, Hans
AU  - Schierholz, Roland
TI  - Morphology Dependency of Li$_{3}$V$_{2}$(PO$_{4}$)$_{3}$/C Cathode Material Regarding to Rate Capability and Cycle Life in Lithium-Ion Batteries
JO  - Electrochimica acta
VL  - 232
SN  - 0013-4686
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2016-07329
SP  - 310-322
PY  - 2017
AB  - Transition-metal phosphates have been extensively studied as potential electrode materials for lithium-ion batteries. For this application, high rate capability and cycling performance are required. In this work, we present a one-pot solvothermal synthesis process in combination with in situ carbonization for the tailoring of Li3V2(PO4)3/C morphologies with improvements of the electrochemical performance. These include an unstructured cluster, a needle-like microstructure, a flake-like microstructure and a hollowsphere microstructure. We demonstrate a significant impact of the particle morphology with respect to the electrochemical performance. The results obtained include, for instance, needle-like Li3V2(PO4)3/C showing a superior rate capability of about 72% (∼96 mAh g−1) of its theoretical capacity being maintained at 30 C, whereas the flake-like Li3V2(PO4)3/C exhibits outstanding cycling performance with a capacity retention of 97.1% (∼112 mAh g−1) of its initial capacity after 1000 cycles at 2 C. Our work demonstrates that the morphology of cathode particles defines a highly selective parameter to improve the electrochemical properties. Accordingly, strategies to selectively tailor particle morphology for a given application become feasible.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000398327300037
DO  - DOI:10.1016/j.electacta.2017.02.136
UR  - https://juser.fz-juelich.de/record/824774
ER  -