Collateral Advantages of a Gel Electrolyte for MnO2 Nanowire Capacitors: Higher Voltage and Reduced Volume

Le Thai, Mya; Qiao, Shaopeng; Dutta, Rajen K.; Jha, Gaurav; Ogata, Alana F.; Chandran, Girija Thesma; Penner, Reginald M.

doi:10.1021/acsenergylett.7b00172

Title: Collateral Advantages of a Gel Electrolyte for MnO₂ Nanowire Capacitors: Higher Voltage and Reduced Volume

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Abstract

Recently we demonstrated that symmetric, all Au@δ-MnO₂ core@shell nanowire capacitors can achieve cycle stability to 100 000 cycles and beyond in a poly(methyl methacrylate) (PMMA) gel electrolyte. Here we examine the limits of the PMMA gel to confer this extraordinary stability, in terms of the accessible maximum voltage, Vmax, and the thickness of the PMMA gel electrolyte layer. Two conclusions are (1) the PMMA gel permits the Vmax to be increased by 50% from 1.2 V to 1.8 V, allowing the specific energy to be increased 5–6 fold, and (2) the PMMA gel layer thickness can be reduced from 180 μm (previously) to 2 μm while simultaneously utilizing two layers of nanowires and patterning nanowires in each layer at 5× higher density. For this nanowire “sandwich” architecture, a net increase in volumetric capacity of 600× up to 500 mF/cm3 can be achieved while retaining cycle stability to 100 000 cycles.

Authors:

Le Thai, Mya ^[1]; Qiao, Shaopeng ^[2];

^[3]; Jha, Gaurav ^[1]; Ogata, Alana F. ^[1]; Chandran, Girija Thesma ^[1];

^[1]

Univ. of California, Irvine, CA (United States). Dept. of Chemistry
Univ. of California, Irvine, CA (United States). Astronomy, and Dept. of Chemistry
Univ. of California, Irvine, CA (United States). Astronomy, and Dept. of Chemistry

Publication Date:: Tue Apr 18 00:00:00 EDT 2017

Research Org.:: Energy Frontier Research Centers (EFRC) (United States). Nanostructures for Electrical Energy Storage (NEES)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1388235

Grant/Contract Number:: SC0001160

Resource Type:: Accepted Manuscript

Journal Name:: ACS Energy Letters

Additional Journal Information:: Journal Volume: 2; Journal Issue: 5; Related Information: NEES partners with University of Maryland (lead); University of California, Irvine; University of Florida; Los Alamos National Laboratory; Sandia National Laboratories; Yale University; Journal ID: ISSN 2380-8195

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE; bio-inspired; energy storage (including batteries and capacitors); defects; charge transport; synthesis (novel materials); synthesis (self-assembly); synthesis (scalable processing)

Citation Formats


                    Le Thai, Mya, Qiao, Shaopeng, Dutta, Rajen K., Jha, Gaurav, Ogata, Alana F., Chandran, Girija Thesma, and Penner, Reginald M. Collateral Advantages of a Gel Electrolyte for MnO2 Nanowire Capacitors: Higher Voltage and Reduced Volume.  United States: N. p., 2017. 
Web.  doi:10.1021/acsenergylett.7b00172.

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                    Le Thai, Mya, Qiao, Shaopeng, Dutta, Rajen K., Jha, Gaurav, Ogata, Alana F., Chandran, Girija Thesma, & Penner, Reginald M. Collateral Advantages of a Gel Electrolyte for MnO2 Nanowire Capacitors: Higher Voltage and Reduced Volume.  United States.  https://doi.org/10.1021/acsenergylett.7b00172

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                    Le Thai, Mya, Qiao, Shaopeng, Dutta, Rajen K., Jha, Gaurav, Ogata, Alana F., Chandran, Girija Thesma, and Penner, Reginald M. Tue .  
"Collateral Advantages of a Gel Electrolyte for MnO2 Nanowire Capacitors: Higher Voltage and Reduced Volume".  United States.  https://doi.org/10.1021/acsenergylett.7b00172.  https://www.osti.gov/servlets/purl/1388235.

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@article{osti_1388235,

  title        = {Collateral Advantages of a Gel Electrolyte for MnO2 Nanowire Capacitors: Higher Voltage and Reduced Volume},

  author       = {Le Thai, Mya and Qiao, Shaopeng and Dutta, Rajen K. and Jha, Gaurav and Ogata, Alana F. and Chandran, Girija Thesma and Penner, Reginald M.},

  abstractNote = {Recently we demonstrated that symmetric, all Au@δ-MnO2 core@shell nanowire capacitors can achieve cycle stability to 100 000 cycles and beyond in a poly(methyl methacrylate) (PMMA) gel electrolyte. Here we examine the limits of the PMMA gel to confer this extraordinary stability, in terms of the accessible maximum voltage, Vmax, and the thickness of the PMMA gel electrolyte layer. Two conclusions are (1) the PMMA gel permits the Vmax to be increased by 50% from 1.2 V to 1.8 V, allowing the specific energy to be increased 5–6 fold, and (2) the PMMA gel layer thickness can be reduced from 180 μm (previously) to 2 μm while simultaneously utilizing two layers of nanowires and patterning nanowires in each layer at 5× higher density. For this nanowire “sandwich” architecture, a net increase in volumetric capacity of 600× up to 500 mF/cm3 can be achieved while retaining cycle stability to 100 000 cycles.},

  doi          = {10.1021/acsenergylett.7b00172},

  journal      = {ACS Energy Letters},

  number       = 5,

  volume       = 2,

  place        = {United States},

  year         = {Tue Apr 18 00:00:00 EDT 2017},

  month        = {Tue Apr 18 00:00:00 EDT 2017}

}

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Title: Collateral Advantages of a Gel Electrolyte for MnO2 Nanowire Capacitors: Higher Voltage and Reduced Volume

Abstract

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Title: Collateral Advantages of a Gel Electrolyte for MnO₂ Nanowire Capacitors: Higher Voltage and Reduced Volume