scholarly journals Investigation of Solvent Type and Salt Addition in High Transference Number Nonaqueous Polyelectrolyte Solutions for Lithium Ion Batteries

2018 ◽  
Vol 51 (21) ◽  
pp. 8761-8771 ◽  
Author(s):  
Kyle M. Diederichsen ◽  
Kara D. Fong ◽  
Rickey C. Terrell ◽  
Kristin A. Persson ◽  
Bryan D. McCloskey
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Transference Number ◽  
Solvent Type ◽  
Salt Addition ◽  
Polyelectrolyte Solutions

scholarly journals Ion Transport and the True Transference Number in Nonaqueous Polyelectrolyte Solutions for Lithium Ion Batteries

2019 ◽  
Vol 5 (7) ◽  
pp. 1250-1260 ◽  
Author(s):  
Kara D. Fong ◽  
Julian Self ◽  
Kyle M. Diederichsen ◽  
Brandon M. Wood ◽  
Bryan D. McCloskey ◽  
...  
Keyword(s):  
Ion Transport ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Transference Number ◽  
Polyelectrolyte Solutions

Immobilized cation functional gel polymer electrolytes with high lithium transference number for lithium ion batteries

2019 ◽  
Vol 572 ◽  
pp. 382-389 ◽  
Author(s):  
Chih-Hao Tsao ◽  
Hou-Ming Su ◽  
Hsiang-Ting Huang ◽  
Ping-Lin Kuo ◽  
Hsisheng Teng
Keyword(s):  
Lithium Ion Batteries ◽  
Polymer Electrolytes ◽  
Lithium Ion ◽  
Transference Number ◽  
Gel Polymer Electrolytes

Promising Routes to a High Li+ Transference Number Electrolyte for Lithium Ion Batteries

2017 ◽  
Vol 2 (11) ◽  
pp. 2563-2575 ◽  
Author(s):  
Kyle M. Diederichsen ◽  
Eric J. McShane ◽  
Bryan D. McCloskey
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Transference Number

Electrolyte Modulators towards Polarization Immune Lithium-Ion Batteries for Sustainable Electric Transportation

2021 ◽  
Author(s):  
Xinru Li ◽  
Pengcheng Xu ◽  
Yue Tian ◽  
Alexis Fortini ◽  
Seungho Choi ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Electric Vehicles ◽  
Dynamic Stress ◽  
Lithium Ion ◽  
Transference Number ◽  
High Rate ◽  
Stress Tests ◽  
Fast Charging ◽  
Metal Organic ◽  
Driving Range

Abstract Lithium-ion batteries for electric vehicles (EV) are subject to fast charging, dynamic acceleration, and regenerative braking. However, the polarization arises from these high-rate operations and tends to deteriorate the battery performance and therefore the driving range and lifespan of EVs. Using metal organic frameworks (MOF) as electrolyte modulators (MEM), we report herein a facile strategy for effective mitigation of polarization, where the MEM can confine anions and enrich electrolyte, affording boosted lithium-ion transference number (up to 0.76) and high ionic conductivity (up to 9 mS cm−1). In addition, such MEM could implant itself into electrolyte interface, conferring the interface with low-resistance and ability to suppress concentration polarization. As a result, commercial cells with MEM deliver remarkably enhanced power output, energy efficiency, and lifespan during high rate (2C, > 3000 cycles) as well as dynamic stress tests (tripled cycle life) that mimic realistic operation of EV. This work introduces a readily implementable approach towards optimizing ion transport in electrolyte and developing polarization immune battery for power-intensive applications.

scholarly journals Onsager Transport Coefficients and Transference Numbers in Polyelectrolyte Solutions and Polymerized Ionic Liquids

2020 ◽  
Author(s):  
Kara D. Fong ◽  
Julian Self ◽  
Bryan D. McCloskey ◽  
Kristin Persson
Keyword(s):  
Ionic Liquids ◽  
Transport Coefficients ◽  
Lithium Ion ◽  
Transference Number ◽  
Einstein Equations ◽  
Coarse Grained ◽  
Transference Numbers ◽  
Polyelectrolyte Solutions ◽  
Dynamics Simulations ◽  
The Ideal

Electrolytes featuring negatively-charged polymers such as nonaqueous polyelectrolyte solutions and polymerized ionic liquids are currently under investigation as potential high cation transference number (t<sub>+</sub>) electrolytes for lithium ion batteries. Herein, we use coarse-grained molecular dynamics simulations to characterize the Onsager transport coefficients of polyelectrolyte solutions as a function of chain length and concentration. For all systems studied, we find that the rigorously computed transference number is substantially lower than that approximated by the ideal solution (Nernst-Einstein) equations typically used to characterize these systems due to the presence of strong anion-anion and cation-anion correlations. None of the polyelectrolyte solutions achieve t<sub>+</sub> greater than that of the conventional binary salt electrolyte, with some solutions having negative t<sub>+</sub>. This work demonstrates that the Nernst-Einstein assumption does not provide a physically meaningful estimate of the transference number in these solutions and calls into question the expectation of polyelectrolytes to exhibit high cation transference number.

scholarly journals Onsager Transport Coefficients and Transference Numbers in Polyelectrolyte Solutions and Polymerized Ionic Liquids

2020 ◽  
Author(s):  
Kara D. Fong ◽  
Julian Self ◽  
Bryan D. McCloskey ◽  
Kristin Persson
Keyword(s):  
Ionic Liquids ◽  
Transport Coefficients ◽  
Lithium Ion ◽  
Transference Number ◽  
Einstein Equations ◽  
Coarse Grained ◽  
Transference Numbers ◽  
Polyelectrolyte Solutions ◽  
Dynamics Simulations ◽  
The Ideal

Electrolytes featuring negatively-charged polymers such as nonaqueous polyelectrolyte solutions and polymerized ionic liquids are currently under investigation as potential high cation transference number (t<sub>+</sub>) electrolytes for lithium ion batteries. Herein, we use coarse-grained molecular dynamics simulations to characterize the Onsager transport coefficients of polyelectrolyte solutions as a function of chain length and concentration. For all systems studied, we find that the rigorously computed transference number is substantially lower than that approximated by the ideal solution (Nernst-Einstein) equations typically used to characterize these systems due to the presence of strong anion-anion and cation-anion correlations. None of the polyelectrolyte solutions achieve t<sub>+</sub> greater than that of the conventional binary salt electrolyte, with some solutions having negative t<sub>+</sub>. This work demonstrates that the Nernst-Einstein assumption does not provide a physically meaningful estimate of the transference number in these solutions and calls into question the expectation of polyelectrolytes to exhibit high cation transference number.

Electrolyte additives to enable nonaqueous polyelectrolyte solutions for lithium ion batteries

2020 ◽  
Vol 5 (1) ◽  
pp. 91-96 ◽  
Author(s):  
Kyle M. Diederichsen ◽  
Bryan D. McCloskey
Keyword(s):  
Lithium Ion Batteries ◽  
Crown Ethers ◽  
Lithium Ion ◽  
Electrolyte Additives ◽  
Polyelectrolyte Solutions

In this work, crown ethers are shown to significantly improve the conductivity of nonaqueous polyelectrolyte solutions, enabling their use in a battery.

Magnesium Borate Fiber Coating Separators with High Lithium‐Ion Transference Number for Lithium‐Ion Batteries

2020 ◽  
Vol 7 (5) ◽  
pp. 1187-1192
Author(s):  
Xin Wang ◽  
Longqing Peng ◽  
Haiming Hua ◽  
Yizheng Liu ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Transference Number ◽  
Magnesium Borate ◽  
Fiber Coating ◽  
Lithium Ion Transference Number
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