Simultaneously Boosting the Ionic Conductivity and Mechanical Strength of Polymer Gel Electrolyte Membranes by Confining Ionic Liquids into Hollow Silica Nanocavities

Thapaliya, Bishnu P.; Do‐Thanh, Chi‐Linh; Jafta, Charl J.; Tao, Runming; Lyu, Hailong; Borisevich, Albina Y.; Yang, Shi‐ze; Sun, Xiao‐Guang; Dai, Sheng

doi:10.1002/batt.201900095

Title: Simultaneously Boosting the Ionic Conductivity and Mechanical Strength of Polymer Gel Electrolyte Membranes by Confining Ionic Liquids into Hollow Silica Nanocavities

Journal Article · 19 September 2019 · Batteries & Supercaps

DOI: https://doi.org/10.1002/batt.201900095 · OSTI ID:1601348

Thapaliya, Bishnu P. ^[1]; Do‐Thanh, Chi‐Linh ^[2]; Jafta, Charl J. ^[3]; Tao, Runming ^[2]; Lyu, Hailong ^[1]; Borisevich, Albina Y. ^[3]; Yang, Shi‐ze ^[4]; Sun, Xiao‐Guang ^[3];

^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)

A central problem of solid polymer electrolytes is their inability to achieve robust mechanical strength with fast ionic conductivities required for commercialization of lithium metal batteries (LMBs). At present, state-of-the-art offers superiority of one at the expense of the other. Here, this dilemma has been solved by fabricating mechanically robust solid composite polymer electrolytes (SCPEs) with superior ionic conductivity (0.5 mS cm^-1 at 20 °C) by confining ionic liquids (ILs) in the hollow scaffold offered by hollow silica (HS) nanospheres with unique architecture. Mechanical robustness was verified by the performance of a Li| |Li symmetric cell cycling for extended hours without short-circuiting. In addition, SCPEs with HS have higher thermal and electrochemical stabilities than those without HS, due to strong interaction and coordination of HS nanoparticles with polymer and ionic liquids. Electrode compatibility and flexibility of the membrane could advance the LMBs technology.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

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

Grant/Contract Number:: SC0012704

OSTI ID:: 1601348

Alternate ID(s):: OSTI ID: 1562730

Report Number(s):: BNL-213643-2020-JAAM

Journal Information:: Batteries & Supercaps, Vol. 2, Issue 12; ISSN 2566-6223

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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25 ENERGY STORAGE
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Title: Simultaneously Boosting the Ionic Conductivity and Mechanical Strength of Polymer Gel Electrolyte Membranes by Confining Ionic Liquids into Hollow Silica Nanocavities

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