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Polyimide as a durable cathode for all-solid-state Li(Na)–organic batteries with boosted cell-level energy density

Journal Article · · Nano Energy
 [1];  [2];  [2];  [3];  [3];  [4];  [4];  [2]
  1. Univ. of Wisconsin, Milwaukee, WI (United States); University of Wisconsin-Milwaukee
  2. Univ. of Wisconsin, Milwaukee, WI (United States)
  3. Sigma-Aldrich Co., LLC., MilliporeSigma, Milwaukee, WI (United States)
  4. Cornell Univ., Ithaca, NY (United States)
The integration of organic electrode materials (OEMs) with solid-state electrolytes (SSEs) is expected to build an all-solid-state battery (ASSB) with long-term sustainability, high safety, and high energy density. Despite this great promise, the cell-level energy density is still far from practically applicable, which stems from the ultrathick SSE layer and thin cathode layer used in a pellet-type ASSB design. Here, a cost-effective polyimide (PI) material was first exploited as an organic cathode for sulfide-based ASSBs. A capacity of ~190 mAh g-1 was delivered with almost no capacity decay over 300 cycles. Moreover, for the first time, a dry-film approach was introduced to manufacture a sheet-type Li–organic ASSB with an ultrathin SSE layer and a high-areal-loading PI cathode. Notably, PI is a perfect candidate for dry-film technology due to its high thermal stability and extraordinary chemical inertness toward sulfide SSEs. Remarkably, the free-standing SSE membrane was merely 46 μm thick, and an ultralow areal resistance of 3.3 Ω cm2 was achieved, more than tenfold lower than that of reported SSE pellets. One order of magnitude boost in the cell-level energy density was achieved. This work presents a significant leap in transferring organic ASSB technology from laboratory research to factory manufacturing.
Research Organization:
Univ. of Wisconsin, Milwaukee, WI (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0008859
OSTI ID:
1907116
Alternate ID(s):
OSTI ID: 1854982
Journal Information:
Nano Energy, Journal Name: Nano Energy Vol. 96; ISSN 2211-2855
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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