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Title: Composite materials for battery applications

Abstract

A process for producing nanocomposite materials for use in batteries includes electroactive materials are incorporated within a nanosheet host material. The process may include treatment at high temperatures and doping to obtain desirable properties.

Inventors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1346970
Patent Number(s):
9,593,413
Application Number:
13/100,579
Assignee:
UCHICAGO ARGONNE, LLC ANL
DOE Contract Number:
AC02-06CH11357
Resource Type:
Patent
Resource Relation:
Patent File Date: 2011 May 04
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE

Citation Formats

Amine, Khalil, Yang, Junbing, Abouimrane, Ali, and Ren, Jianguo. Composite materials for battery applications. United States: N. p., 2017. Web.
Amine, Khalil, Yang, Junbing, Abouimrane, Ali, & Ren, Jianguo. Composite materials for battery applications. United States.
Amine, Khalil, Yang, Junbing, Abouimrane, Ali, and Ren, Jianguo. Tue . "Composite materials for battery applications". United States. doi:. https://www.osti.gov/servlets/purl/1346970.
@article{osti_1346970,
title = {Composite materials for battery applications},
author = {Amine, Khalil and Yang, Junbing and Abouimrane, Ali and Ren, Jianguo},
abstractNote = {A process for producing nanocomposite materials for use in batteries includes electroactive materials are incorporated within a nanosheet host material. The process may include treatment at high temperatures and doping to obtain desirable properties.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 14 00:00:00 EDT 2017},
month = {Tue Mar 14 00:00:00 EDT 2017}
}

Patent:

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  • A solid molecular composite polymer-based electrolyte is made for batteries, wherein silicate compositing produces a electrolytic polymer with a semi-rigid silicate condensate framework, and then mechanical-stabilization by radiation of the outer surface of the composited material is done to form a durable and non-tacky texture on the electrolyte. The preferred ultraviolet radiation produces this desirable outer surface by creating a thin, shallow skin of crosslinked polymer on the composite material. Preferably, a short-duration of low-medium range ultraviolet radiation is used to crosslink the polymers only a short distance into the polymer, so that the properties of the bulk of themore » polymer and the bulk of the molecular composite material remain unchanged, but the tough and stable skin formed on the outer surface lends durability and processability to the entire composite material product.« less
  • A method of preparing a composite body comprising a vitreous carbon substrate having a felt prepared from materials selected from the group consisting of metal, carbon, and graphite bonded to a major surface of the substrate is described. The method comprises forming and curing a branched polyphenylene prepolymer having a number average molecular weight of between about 500 and 800 and bearing terminal acetylene functionality to form a shaped, crosslinked body; preparing a solution of the branched polyphenylene prepolymer in an organic solvent in an amount ranging from about 1 to 60 parts by weight of the prepolymer per 100more » parts by weight of the solution; preparing a composite of the shaped body and the felt to be bonded to it with the solution interposed between them; and firing the composite in an inert atmosphere at a temperature of at least about 800/sup 0/C until the polymer in the solution and the shaped body is converted to vitreous carbon and the shaped body is integrally bonded to the graphite felt. The composite body so formed may be employed in a secondary battery or cell wherein the felt serves as a cathodic electrode and the shaped body serves as a current collector. 1 figure.« less
  • Herein we highlight the significance of nanoscale attachment modality as an important determinant of observed electrochemical performance. Specifically, controlled loading ratios of multi-walled carbon nanotubes (MWNTs) have been successfully anchored onto the surfaces of a unique “flower-like” Li 4Ti 5O 12 (LTO) micro-scale sphere motif, for the first time, using a number of different and distinctive preparative approaches, including (i) a sonication method, (ii) an in situ direct-deposition approach, (iii) a covalent attachment protocol, as well as (iv) a π-π interaction strategy. In terms of structural characterization, the composites generated by physical sonication as well as non-covalent π-π interactions retainedmore » the intrinsic hierarchical “flower-like” morphology and exhibited a similar crystallinity profile as compared with that of pure LTO. By comparison, the composite prepared by an in situ direct deposition approach yielded not only a fragmented LTO structure, likely due to the possible interfering presence of the MWNTs themselves during the relevant hydrothermal reaction, but also a larger crystallite size, owing to the higher annealing temperature associated with its preparation. Finally, the composite created via covalent attachment was covered with an amorphous insulating linker, which probably led to a decreased contact area between the LTO and the MWNTs and hence, a lower crystallinity in the resulting composite. In addition electrode tests suggested that the composite generated by π-π interactions out-performed the other three analogous heterostructures, due to a smaller charge transfer resistance as well as a faster Li-ion diffusion. In particular, the LTO-MWNT composite, produced by π-π interactions, exhibited a reproducibly high rate capability as well as a reliably solid cycling stability, delivering 132 mA h g -1 at 50 C, after 100 discharge/charge cycles, including 40 cycles at a high (>20 C) rate. To conclude, such data denote the highest electrochemical performance measured to date as compared with any LTO-carbon nanotube-based composite materials previously reported, under high discharge rate conditions, and tangibly underscore the correlation between preparative methodology and the resulting performance metrics.« less
  • This invention is in solid polymer-based electrolytes for battery applications. It uses molecular composite technology, coupled with unique preparation techniques to render a self-doped, stabilized electrolyte material suitable for inclusion in both primary and secondary batteries. In particular, a salt is incorporated in a nano-composite material formed by the in situ catalyzed condensation of a ceramic precursor in the presence of a solvated polymer material, utilizing a condensation agent comprised of at least one cation amenable to SPE applications. As such, the counterion in the condensation agent used in the formation of the molecular composite is already present as themore » electrolyte matrix develops. This procedure effectively decouples the cation loading levels required for maximum ionic conductivity from electrolyte physical properties associated with condensation agent loading levels by utilizing the inverse relationship discovered between condensation agent loading and the time domain of the aging step.« less