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Title: Dependence of Linker Length and Composition on Ionic Conductivity and Lithium Deposition in Single-Ion Conducting Network Polymers

Journal Article · · Macromolecules
 [1];  [1];  [1]; ORCiD logo [2]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

In this report, single-ion conducting electrolytes stand as promising alternatives to state-of-the-Art electrolytes in lithium batteries, although a single-ion conducting material with high Li+ conductivity, stability in contact with lithium, and suitable mechanical properties has been slow to emerge. Here, we describe the synthesis of a series of single-ion conducting network polymers from the reaction of tetrakis(4-(chloromethyl)-2,3,5,6-Tetrafluorophenyl)borate with oligoethylene glycoxide linkers Li2O[(CH2CH2)O]n (n = 1, 2, 3, 9, and 22). Polymers with the longest linkers (n = 9 and 22; ANP-9 and ANP-10, respectively) form materials with conductivities of ~ 10-6 S cm-1 at 100 °C. With the addition of 65 wt % propylene carbonate (PC), all the network polymers in the series exhibit high conductivities at ambient temperatures, with the n = 1 material (ANP-6) achieving a bulk ionic conductivity of 2.5 x 10-4 S cm-1 at 25 °C. More conductive single-ion conducting gels could be prepared by using the less coordinating pentanediol dilithium salt as a linker (ANP-11; σ = 3.5 x 10-4 S cm-1 at 25 °C), although this material exhibited a surprisingly high interfacial resistance in contact with a lithium electrode. In contrast, the gel formed with ANP-6 is notably stable in contact with metallic lithium electrodes, displays a lithium-ion transference number of unity, and boasts a wide electrochemical stability window of greater than 4.5 V. Temperature-dependent ac impedance analysis reveals that the ionic conductivity of this material-and likely the other gels in the series-matches closely to a Vogel-Tamman-Fulcher temperature model.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1843007
Journal Information:
Macromolecules, Journal Name: Macromolecules Journal Issue: 16 Vol. 54; ISSN 0024-9297
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (36)

Polymer Electrolytes for Lithium-Ion Batteries journal April 1998
A Single‐Ion Conducting Borate Network Polymer as a Viable Quasi‐Solid Electrolyte for Lithium Metal Batteries journal January 2020
An Anionic Microporous Polymer Network Prepared by the Polymerization of Weakly Coordinating Anions journal October 2013
Die Abhängigkeit der Viscosität von der Temperatur bie unterkühlten Flüssigkeiten journal October 1926
Electrolytes for Lithium and Lithium-Ion Batteries book January 2014
High performance PEO-based polymer electrolytes and their application in rechargeable lithium polymer batteries journal August 2007
Conductivity and transference number measurements on polymer electrolytes journal September 1988
Polymer electrolytes from plasticized polyMOBs and their gel forms journal June 2003
Onset of dendritic growth in lithium/polymer cells journal July 2001
A single-ion polymer electrolyte based on boronate for lithium ion batteries journal August 2012
Synthesis, Characterization and Battery Performance of A Lithium Poly (4-vinylphenol) Phenolate Borate Composite Membrane journal September 2014
Ceramic and polymeric solid electrolytes for lithium-ion batteries journal August 2010
Polyvinyl formal based single-ion conductor membranes as polymer electrolytes for lithium ion batteries journal November 2014
New gel polyelectrolytes for rechargeable lithium batteries journal November 2004
A single-ion gel polymer electrolyte based on polymeric lithium tartaric acid borate and its superior battery performance journal September 2014
Synthesis and Lithium Ion Conduction of Polysiloxane Single-Ion Conductors Containing Novel Weak-Binding Borates journal June 2012
Physical techniques for the study of solid electrolytes journal August 1981
Nonaqueous Liquid Electrolytes for Lithium-Based Rechargeable Batteries journal October 2004
Crystalline Lithium Imidazolate Covalent Organic Frameworks with High Li-Ion Conductivity journal April 2019
Synthesis and Characterization of Network Type Single Ion Conductors journal March 2004
Synthesis and Characterization of Network Single Ion Conductors Based on Comb-Branched Polyepoxide Ethers and Lithium Bis(allylmalonato)borate journal January 2006
Influence of Solvating Plasticizer on Ion Conduction of Polysiloxane Single-Ion Conductors journal April 2014
Building better batteries journal February 2008
Single-ion BAB triblock copolymers as highly efficient electrolytes for lithium-metal batteries journal March 2013
Synthesis and characterization of solid single ion conductors based on poly[lithium tetrakis(ethyleneboryl)borate] journal January 2009
Porous aromatic frameworks: Synthesis, structure and functions journal January 2013
Covalent organic frameworks (COFs): from design to applications journal January 2013
Tetraarylborate polymer networks as single-ion conducting solid electrolytes journal January 2015
Structure–property study of cross-linked hydrocarbon/poly(ethylene oxide) electrolytes with superior conductivity and dendrite resistance journal January 2016
Electrolytes for solid-state lithium rechargeable batteries: recent advances and perspectives journal January 2011
Nonflammable perfluoropolyether-based electrolytes for lithium batteries journal February 2014
Solid polymer electrolytes: materials designing and all-solid-state battery applications: an overview journal October 2008
Electrochemical aspects of the generation of ramified metallic electrodeposits journal December 1990
Analysis of Recent Measurements of the Viscosity of Glasses journal June 1925
Polyelectrolyte Membranes Containing Lithium Malonato(difluoro)borate for Lithium-Ion Systems conference January 2011
The Development and Future of Lithium Ion Batteries journal December 2016