Journal
NANOSCALE
Volume 10, Issue 29, Pages 14165-14170Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr03495h
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Funding
- National Science Foundation of China [51636006]
- Shanghai Rising Star Program [15QA1401300]
- Engineering and Physical Sciences Research Council (EPSRC) [EP/N007921/1, EP/P026435/1]
- EPSRC [EP/N007921/1, EP/P026435/1] Funding Source: UKRI
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Orthorhombic Nb2O5 (T-Nb2O5) nanocrystallites are successfully fabricated through an evaporation induced self-assembly (EISA) method guided by a commercialised triblock copolymer - Pluronic F127. We demonstrate a morphology transition of T-Nb2O5 from continuous porous nanofilms to monodisperse nanoparticles by changing the content of Pluronic F127. The electrochemical results show that the optimized monodisperse Nb-2 with a particle size of 20 nm achieves premier Li-ion intercalation kinetics and higher rate capability than mesoporous T-Nb2O5 nanofilms. Nb-2 presents an initial intercalation capacity of 528 and 451 C g(-1) at current densities of 0.5 and 5 A g(-1) and exhibited a stable capacity of 499 C g(-1) after 300 charge/discharge cycles and 380 C g(-1) after 1000 cycles, respectively. We would expect this copolymer guided monodispersion of T-Nb2O5 nanoparticles with high Li+ intercalation performance to open up a new window for novel EES technologies.
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