Accession Number:

AD1107208

Title:

Rational Design of Composite Solid Electrolyte for Structural Energy Storage

Descriptive Note:

Technical Report,01 Aug 2018,31 Jul 2020

Corporate Author:

COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK NEW YORK United States

Personal Author(s):

Report Date:

2020-07-29

Pagination or Media Count:

20.0

Abstract:

This project focuses on developing structural batteries with high energy density. In the last two years, we have developed two systems for structural energy storage. The first one is to combine high-energy-density LiS battery with T300 carbon fibers and ceramicpolymer composite solid electrolyte, which leads to high modulus of 10-15 GPa at cell level and high strength of tilde150 MPa. The second one is solid state Li batteries with a solid polymerceramic electrolyte inspired by the brick-mortar structure of nacre, where polymer filler enhances the fracture energy of the ceramic electrolyte so that the electrolyte is much tougher than pure ceramic electrolyte. The major achievements include 1 Solid composite electrolytes with high ionic conductivities and good mechanical properties, such as a nacre-like LATPpolymer electrolyte with conductivity of tilde8 x 1011-4 Siem, and fracture strain, flexural strength and modulus of 1.1 percent, 35 MPa and 7.8 GPa, respectively, and a BNPVdF composite electrolyte with conductivity of tilde3.6 x 1011-4 Siem, which functions well under compression of 190 MPa limit of current instrument, 2 prototype Li-S battery demonstrated with structural components e.g. carbon fabric-reinforced cathodeanode. The capacity reaches 1100 mAhg with a retention of 95 percent100 cycles. The cell functions well under a compressive pressure of 20 MPa, while conventional cells fail at tilde10 MPa, and 3 one paper entitled Nacre-Inspired Composite Electrolytes for Load-Bearing Solid-State Lithium Metal Batteries published in Advanced Materials IF25.8, which has been cited for 9 times in only eight months, and one paper entitled Mechanically-robust structural lithium-sulfur battery with high energy density under review in Energy Storage Materials IF 16.0

Subject Categories:

  • Physical Chemistry
  • Energy Storage

Distribution Statement:

APPROVED FOR PUBLIC RELEASE