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Title: 100k Cycles and Beyond: Extraordinary Cycle Stability for MnO 2 Nanowires Imparted by a Gel Electrolyte

Authors:
; ; ; ;
Publication Date:
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) (SC-22)
OSTI Identifier:
1371411
DOE Contract Number:
SC0001160
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Energy Letters; Journal Volume: 1; Journal Issue: 1; 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
Country of Publication:
United States
Language:
English
Subject:
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, Chandran, Girija Thesma, Dutta, Rajen K., Li, Xiaowei, and Penner, Reginald M.. 100k Cycles and Beyond: Extraordinary Cycle Stability for MnO 2 Nanowires Imparted by a Gel Electrolyte. United States: N. p., 2016. Web. doi:10.1021/acsenergylett.6b00029.
Le Thai, Mya, Chandran, Girija Thesma, Dutta, Rajen K., Li, Xiaowei, & Penner, Reginald M.. 100k Cycles and Beyond: Extraordinary Cycle Stability for MnO 2 Nanowires Imparted by a Gel Electrolyte. United States. doi:10.1021/acsenergylett.6b00029.
Le Thai, Mya, Chandran, Girija Thesma, Dutta, Rajen K., Li, Xiaowei, and Penner, Reginald M.. 2016. "100k Cycles and Beyond: Extraordinary Cycle Stability for MnO 2 Nanowires Imparted by a Gel Electrolyte". United States. doi:10.1021/acsenergylett.6b00029.
@article{osti_1371411,
title = {100k Cycles and Beyond: Extraordinary Cycle Stability for MnO 2 Nanowires Imparted by a Gel Electrolyte},
author = {Le Thai, Mya and Chandran, Girija Thesma and Dutta, Rajen K. and Li, Xiaowei and Penner, Reginald M.},
abstractNote = {},
doi = {10.1021/acsenergylett.6b00029},
journal = {ACS Energy Letters},
number = 1,
volume = 1,
place = {United States},
year = 2016,
month = 7
}
  • Na-ion battery, as an alternative high-efficiency and low-cost energy storage device to Li-ion battery, has attracted wide interest for electrical grid and vehicle applications. However, demonstration of a full-cell battery with high energy and long cycle life remains a significant challenge. Here, we investigated the role of solid electrolyte interphase (SEI) formation on both cathodes and anodes and revealed a potential way to achieve long-term stability for Na-ion battery full-cells. Pre-cycling of cathodes and anodes leads to preformation of SEI, and hence mitigates the consumption of Na ions in full-cells. The example full-cell of Na0.44MnO2-hard carbon with pre-cycled and capacity-matchedmore » electrodes can deliver a specific capacity of ~116 mAh/g based on Na0.44MnO2 at 1C rate (1C = 120 mA/g). The corresponding specific energy is ~313 Wh/kg. Excellent cycling stability with ~77% capacity retention over 2000 cycles was demonstrated at 2C rate. Our work represents a leap forward in Na-ion battery development.« less
  • The cold-fluid extraordinary-mode eigenvalue equation is solved numerically to determine the influence of equilibrium profile shape on the detailed stability properties of relativistic non-neutral electron flow in a planar diode with cathode located at x = 0 and anode at x = d. Stability properties are investigated for the class of equilibrium energy profiles ..gamma../sub b/(x) specified by ..gamma../sub b/(x) = lambda cosh ..cap alpha../sub 1/x + (1 - lambda))(1 - ..cap alpha../sub 2//sup 2/(b/sup 2/ - x/sup 2/))/sup 1/2//(1 - ..cap alpha../sub 2//sup 2/b/sup 2/)/sup 1/2/) over the interval 0 less than or equal to x less than ormore » equal to b. Here ..cap alpha../sub 1/ and ..cap alpha../sub 2/ are constants (with a/sub 2//sup 2/b/sup 2/ < 1), x = b is the outer edge of the electron layer, and lambda is a constant parameter in the range of 0 less than or equal to lambda less than or equal to 1. The corresponding equilibrium profiles for B/sub z/(x), n/sub b/(x), and E/sub x/(x) are determined self-consistently from the steady-state (delta/deltat = 0) cold-fluid-Maxwell equations. As the parameter lambda is varied from unity to zero there is a large change in the equilibrium profile for n/sub b/(x)/..gamma../sub b/(x), ranging from n/sub b/(x)/..gamma../sub b/(x) = constant over the interval 0 less than or equal to x < b when lambda = 1, to monotonic decreasing profiles for n/sub b/(x)/..gamma../sub b/(x) when lambda < 1. The numerical analysis of the extraordinary-mode eigenvalue equation shows that the detailed stability properties are very sensitive to the shape of the equilibrium profiles. As lambda is reduced from unity, and the profile for n/sub b/(x)/..gamma../sub b/(x) becomes monotonic decreasing, it is found that the instability growth rate Im omega is reduced. Moreover, the more rapid the decrease in n/sub b/(x)/..gamma../sub b/(x) (i.e., the smaller the value of lambda), the more the growth rate is reduced. Indeed, in some parameter regimes, the instability growth rate can be reduced to zero over the range of wavenumber k examined numerically. 18 references, 9 figures.« less