MnO2-modified Li3V2(PO4)3/C (LVP/C) composites with plate-like structure were prepared via an improved sol–gel method followed by PVA-assisted suspension coating. The plate-like structure provides an enlarged contact area between the electrolyte and electrode, alleviating the Li+ diffusion and e− transport during the reaction process. The formed hybrid coating layer consisted of C and MnO2 has the double effects, that is, the formation of a complete continuous protective layer on the surface of LVP particles and the simultaneous improvement of electronic and ionic conductivities. This coating layer not only prevents the V3+ dissolution into the electrolyte, but also achieves the simultaneous Li+/e− diffusion at charge–discharge process. Benefiting from the unique structure and the synergistic effect of C and MnO2, the 3 wt% MnO2-modified LVP/C material (M-3) exhibits the most excellent electrochemical performance among all the samples. At a high current rate of 5 C, the M-3 electrode delivers a discharge capacity of 113.2 mAh g−1 and corresponds to capacity retention almost 100% after 100 cycles. Even at low temperatures of 0 and − 20 °C, the discharge capacities of M-3 are 102.4 mAh g−1 at 2 C and 81.6 mAh g−1 at 1 C, with capacity retention of 98.8 and 97.3%, respectively. The enhanced electrochemical performance of M-3 is mainly attributed to the cooperation of C and MnO2, which provides large specific surface area and complete conductive network. As a result, the MnO2-modified LVP/C composites with the plate-like structure can be a promising candidate as cathode materials for LIBs.
Journal of Materials Science – Springer Journals
Published: Oct 12, 2017
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera