Sequential Deposition of Integrated Cathode-Inorganic Separator-Anode Multilayers for High Performance Li-Ion Batteries.

Content Provider	Europe PMC
Author	Evans, Jack D. Sun, Yige Grant, Patrick S.
Copyright Year	2022
Abstract	A porous, spray-deposited Al2O3-based separatorwas developed to enable the direct deposition of an electrode/separator/electrodeLi-ion battery full cell assembly in a single operation. The optimizedsprayed separator consisted of 50 nm Al2O3 particles,1 wt % poly(acrylic acid), and 5 wt % styrene–butadiene rubber,deposited from an 80:20 vol % suspension of water and isopropanol.Separators between 5 and 22 μm thick had consistent andsimilar porosity of ∼58%, excellent wettability, thermal stabilityto at least 180 °C, adequate electrochemical stabilityand high effective ionic conductivity of ∼1 mS cm–1 at room temperature in an EC/DMC electrolyte, roughly double thatof a conventional polypropylene separator. A sequentially depositedthree-layer LiFePO4/Al2O3/Li4Ti5O12 full cell, the first of its kind,showed similar rate performance to an identical cell with a conventionalpolypropylene separator, with a capacity of ∼50 mAh g–1 at 30 C. However, after cycling at 2 C for 400 cycles, Al2O3 separator full cells retained 96.3% capacity, significantlymore than conventional full cells with a capacity of 79.2% remaining.
ISSN	19448244
Journal	ACS Applied Materials & Interfaces
Volume Number	14
PubMed Central reference number	PMC9353779
Issue Number	30
PubMed reference number	35867807
e-ISSN	19448252
DOI	10.1021/acsami.2c03828
Language	English
Publisher	American Chemical Society
Publisher Date	2022-07-22
Access Restriction	Open
Rights License	Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). © 2022 The Authors. Published by American Chemical Society
Subject Keyword	lithium-ion battery spray processing inorganicseparator direct deposition layer-by-layer fullcell
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Medicine Materials Science