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High rate and durable, binder free anode based on silicon loaded MoO3 nanoplatelets.

Martinez-Garcia A, Thapa AK, Dharmadasa R, Nguyen TQ, Jasinski J, Druffel TL, Sunkara MK - Sci Rep (2015)

Bottom Line: Li2MoO4 and Li(1.333)Mo(0.666)O2 were identified as the products of lithiation of pristine MoO3 nanoplatelets and silicon-decorated MoO3, respectively, accounting for lower than previously reported lithiation potentials.MoO3 nanoplatelet arrays were deposited using hot-wire chemical vapor deposition.Silicon decorated MoO3 nanoplatelets exhibited enhanced capacity of 1037 mAh g(-1) with exceptional cyclability when charged/discharged at high current densities of 10 A g(-1).

View Article: PubMed Central - PubMed

Affiliation: 1] Department of Chemical Engineering University of Louisville Louisville, KY 40292. [2] Conn Center for Renewable Energy Research.

ABSTRACT
In order to make fast-charging batteries a reality for electric vehicles, durable, more energy dense and high-current density resistant anodes need to be developed. With such purpose, a low lithiation potential of 0.2 V vs. Li/Li(+) for MoO3 nanoplatelet arrays is reported here for anodes in a lithium ion battery. The composite material here presented affords elevated charge capacity while at the same time withstands rapid cycling for longer periods of time. Li2MoO4 and Li(1.333)Mo(0.666)O2 were identified as the products of lithiation of pristine MoO3 nanoplatelets and silicon-decorated MoO3, respectively, accounting for lower than previously reported lithiation potentials. MoO3 nanoplatelet arrays were deposited using hot-wire chemical vapor deposition. Due to excellent voltage compatibility, composite lithium ion battery anodes comprising molybdenum oxide nanoplatelets decorated with silicon nanoparticles (0.3% by wt.) were prepared using an ultrasonic spray. Silicon decorated MoO3 nanoplatelets exhibited enhanced capacity of 1037 mAh g(-1) with exceptional cyclability when charged/discharged at high current densities of 10 A g(-1).

No MeSH data available.


Related in: MedlinePlus

C-rate testing of a) as-synthesized MoO3 (0.9 mg of MoO3) (MoO3 0.5 mg cm−2), b) Si@MoO3 (0.7 mg of MoO3, Silicon loading: 2 sprays ~1.2 μg Si, ~0.2 wt% Si) (MoO3 x mg cm−2, Si x μg cm−2).
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f6: C-rate testing of a) as-synthesized MoO3 (0.9 mg of MoO3) (MoO3 0.5 mg cm−2), b) Si@MoO3 (0.7 mg of MoO3, Silicon loading: 2 sprays ~1.2 μg Si, ~0.2 wt% Si) (MoO3 x mg cm−2, Si x μg cm−2).

Mentions: C-rate tests for pristine MoO3 nanoplatelets and silicon-decorated MoO3 nanoplatelets are presented in Fig. 6a and b, respectively. From the plots it is obvious that the capacity of the as-synthesized MoO3 electrode faded faster than the silicon-decorated MoO3 electrode, as the current density was increased. The pristine MoO3 nanoplatelet sample of Fig. 6a presents 40% decay in capacity throughout the test after being cycled using increasing charge/discharge rates of 100, 200, 500, 1000, 1500, 2000, 3000, 5000 and 10000 mA g−1. By contrast the Si@MoO3 sample decayed only 27% when subjected to the same cycling conditions. The 2nd cycle current density was used for calculating the percent decay. When the charge/discharge rate was reduced back to 2000 mA g−1 and 1000 mA g−1, the specific capacity recovered better in the Si decorated electrode.


High rate and durable, binder free anode based on silicon loaded MoO3 nanoplatelets.

Martinez-Garcia A, Thapa AK, Dharmadasa R, Nguyen TQ, Jasinski J, Druffel TL, Sunkara MK - Sci Rep (2015)

C-rate testing of a) as-synthesized MoO3 (0.9 mg of MoO3) (MoO3 0.5 mg cm−2), b) Si@MoO3 (0.7 mg of MoO3, Silicon loading: 2 sprays ~1.2 μg Si, ~0.2 wt% Si) (MoO3 x mg cm−2, Si x μg cm−2).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4441197&req=5

f6: C-rate testing of a) as-synthesized MoO3 (0.9 mg of MoO3) (MoO3 0.5 mg cm−2), b) Si@MoO3 (0.7 mg of MoO3, Silicon loading: 2 sprays ~1.2 μg Si, ~0.2 wt% Si) (MoO3 x mg cm−2, Si x μg cm−2).
Mentions: C-rate tests for pristine MoO3 nanoplatelets and silicon-decorated MoO3 nanoplatelets are presented in Fig. 6a and b, respectively. From the plots it is obvious that the capacity of the as-synthesized MoO3 electrode faded faster than the silicon-decorated MoO3 electrode, as the current density was increased. The pristine MoO3 nanoplatelet sample of Fig. 6a presents 40% decay in capacity throughout the test after being cycled using increasing charge/discharge rates of 100, 200, 500, 1000, 1500, 2000, 3000, 5000 and 10000 mA g−1. By contrast the Si@MoO3 sample decayed only 27% when subjected to the same cycling conditions. The 2nd cycle current density was used for calculating the percent decay. When the charge/discharge rate was reduced back to 2000 mA g−1 and 1000 mA g−1, the specific capacity recovered better in the Si decorated electrode.

Bottom Line: Li2MoO4 and Li(1.333)Mo(0.666)O2 were identified as the products of lithiation of pristine MoO3 nanoplatelets and silicon-decorated MoO3, respectively, accounting for lower than previously reported lithiation potentials.MoO3 nanoplatelet arrays were deposited using hot-wire chemical vapor deposition.Silicon decorated MoO3 nanoplatelets exhibited enhanced capacity of 1037 mAh g(-1) with exceptional cyclability when charged/discharged at high current densities of 10 A g(-1).

View Article: PubMed Central - PubMed

Affiliation: 1] Department of Chemical Engineering University of Louisville Louisville, KY 40292. [2] Conn Center for Renewable Energy Research.

ABSTRACT
In order to make fast-charging batteries a reality for electric vehicles, durable, more energy dense and high-current density resistant anodes need to be developed. With such purpose, a low lithiation potential of 0.2 V vs. Li/Li(+) for MoO3 nanoplatelet arrays is reported here for anodes in a lithium ion battery. The composite material here presented affords elevated charge capacity while at the same time withstands rapid cycling for longer periods of time. Li2MoO4 and Li(1.333)Mo(0.666)O2 were identified as the products of lithiation of pristine MoO3 nanoplatelets and silicon-decorated MoO3, respectively, accounting for lower than previously reported lithiation potentials. MoO3 nanoplatelet arrays were deposited using hot-wire chemical vapor deposition. Due to excellent voltage compatibility, composite lithium ion battery anodes comprising molybdenum oxide nanoplatelets decorated with silicon nanoparticles (0.3% by wt.) were prepared using an ultrasonic spray. Silicon decorated MoO3 nanoplatelets exhibited enhanced capacity of 1037 mAh g(-1) with exceptional cyclability when charged/discharged at high current densities of 10 A g(-1).

No MeSH data available.


Related in: MedlinePlus