Article
Chemistry, Physical
Gregorio Guzman-Gonzalez, Marta Alvarez-Tirado, Jorge L. Olmedo-Martinez, Matias L. Picchio, Nerea Casado, Maria Forsyth, David Mecerreyes
Summary: This article demonstrates the use of single-component electrolytes in lithium batteries based on new lithium borate ionic liquids at room temperature. The optimized lithium ionic liquids (LiILs) show high ionic conductivity, lithium transference numbers, and electrochemical stability. These LiILs also exhibit high compatibility with lithium-metal electrodes, resulting in excellent electrochemical performance in lithium-metal battery cells.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhen Chen, Dominik Stepien, Fanglin Wu, Maider Zarrabeitia, Hai-Peng Liang, Jae-Kwang Kim, Guk-Tae Kim, Stefano Passerini
Summary: By utilizing a thin protective layer and an ionic liquid electrolyte, the interfacial stability and electrochemical performance of lithium-ion batteries can be improved. The addition of specific ionic liquid has been found to effectively promote the formation of a stable interface between lithium and hybrid electrolyte, thereby extending the lifespan of the batteries.
Article
Engineering, Environmental
Jifang Fu, Yufeng Xu, Linna Dong, Liya Chen, Qi Lu, Mengmeng Li, Xingfa Zeng, Sanwei Dai, Guorong Chen, Liyi Shi
Summary: The study synthesized a series of multiclaw-shaped octasilsesquioxanes functionalized ionic liquids for developing novel hybrid solid polymer electrolytes with high ionic conductivity. These electrolytes exhibit high electrochemical stability and ionic conductivity, showing promising cycling performance and rate capability in Li/LiFePO 4 cells.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Junda Huang, Jian He, Quanhui Liu, Jianmin Ma
Summary: Realizing uniform Li+ flow is crucial for achieving even Li deposition in lithium metal batteries (LMBs). In this study, a dynamic ion sieve concept is proposed, which involves designing a buffer layer near the Li anode surface to regulate Li+ spatial arrangement by introducing TMPB into the carbonate electrolyte. The buffer layer induced by TMP+ allows solvated Li+ sufficient time to redistribute and accumulate on the Li anode surface, resulting in a uniform and concentrated Li+ flow. Additionally, TFSI- participates in the formation of an inorganic-rich solid electrolyte interphase (SEI) with Li3N, enhancing the Li+ conductivity of the SEI. As a result, the stable and uniform Li deposition achieved excellent cycling performance in Li||Li symmetric cells for up to 1000 hours at 0.5 mA cm(-2). Furthermore, the Li||NCM622 full cell exhibited excellent cycling stability with a high-capacity retention rate of 66.7% after 300 cycles.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Electrochemistry
Ruggero Poiana, Ernestino Lufrano, Akiko Tsurumaki, Cataldo Simari, Isabella Nicotera, Maria Assunta Navarra
Summary: In this study, gel polymer electrolytes (GPEs) based on PVdF-HFP, 1 M LiPF6 in EC/DMC (LP30), and [Py-14]PF6 were developed to enhance the safety and electrochemical performance of high voltage lithium batteries. The GPEs demonstrated nonflammable character and mechanical stability through physical crosslinks, and showed improved lithium ion conduction property. When using LP30 with 30 wt% [Py-14]PF6, the lithium metal batteries exhibited enhanced electrochemical performance with high coulombic efficiency and specific capacity retention throughout 150 cycles. This suggests that [Py-14]PF6 is a promising additive for extending battery life.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Le Yu, Lu Yu, Qing Liu, Tao Meng, Sen Wang, Xianluo Hu
Summary: The study demonstrates a novel ionogel electrolyte membrane with high Li+ conductivity and excellent thermal stability, utilizing positively charged poly(ionic liquid) nanofibers favorable for Li+ transport, improving the rate capability and cyclability of solid-state lithium batteries over a wider temperature range.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Joao C. Barbosa, Daniela M. Correia, Arkaitz Fidalgo-Marijuan, Renato Goncalves, Stanislav Ferdov, Veronica de Zea Bermudez, Senentxu Lanceros-Mendez, Carlos M. Costa
Summary: Renewable energy sources require efficient energy storage systems, and lithium-ion batteries are a standout option. However, there is still room for improvement in terms of safety and cycling stability. By implementing solid polymer electrolytes (SPEs) instead of the commonly used separator/electrolyte system, these issues can be addressed. This study focuses on the development of ternary SPEs based on specific host polymers, fillers, and ionic liquids to enhance the performance of lithium-ion batteries in terms of conductivity, stability, and cyclability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Physical
Xiao Tang, Shuyao Lv, Kun Jiang, Guohui Zhou, Xiaomin Liu
Summary: Ionic liquid-based electrolytes have been developed in lithium-ion batteries to enhance safety and performance. This review summarizes the recent progress in the physiochemical properties, interphase formation ability, and electrochemical performance of ionic liquids and ionic liquid-based electrolytes. The applications of different types of ionic liquid-based electrolytes are discussed in detail. The challenges and perspectives for further development of ionic liquid-based electrolytes in lithium-ion batteries are also presented.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Jie Liu, Yao Xu, Fei Xu, Jing Li, Yanbo Chen, Junjie Qiao, Yuyang Han, Yurong Ren, Bencai Lin
Summary: Zwitterionic poly(ionic liquid)-based polymer electrolytes with a network structure were prepared by ultraviolet-irradiation radical polymerization, showing high thermal stability and excellent dimensional stability. The PEGMEA provided sufficient transport sites for Li+ and a high ionic conductivity of 0.20 x 10(-3) S cm(-1). The electrolyte exhibited a high lithium-ion transference number of 0.78, and the lithium symmetric battery showed good performance with a voltage polarization of 150 mV over 600 h. The Li/LiFePO4 battery demonstrated a discharge capacity of 122 mAh g(-1), a capacity retention of 90.0% after 100 cycles, and an average Coulombic efficiency exceeding 99% at 0.1 C, indicating its potential in lithium-ion batteries.
Article
Chemistry, Physical
Jose M. Otero-Mato, Alejandro Rivera-Pousa, Hadrian Montes-Campos, Oscar Cabeza, A. Heuer, D. Diddens, Luis M. Varela
Summary: This study investigates the stability and structure changes of binary mixtures of several protic ionic liquids with polyethylene oxide using molecular dynamics simulations. It is found that ethylammonium acetate has a wider solubility range compared to other ionic liquids, and its interaction with the polymer is limited. The presence of the polymer has minimal interference on the single-particle dynamics and lithium transport in the liquid phase, contrary to previous results with other ionic liquids.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Review
Chemistry, Multidisciplinary
Peng Fan, Hao Liu, Vladimir Marosz, Nia T. Samuels, Steven L. Suib, Luyi Sun, Libing Liao
Summary: There is an urgent demand for developing all solid-state lithium-ion batteries with high energy density and safety. The core technology in solid-state batteries is the solid-state electrolyte, and composite polymer electrolytes are considered as one of the most promising candidates due to their comprehensive performance. Recent representative CPEs with synthetic fillers and natural clay-based fillers show great potential for high-performance LIBs.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Alex R. Neale, Ryan Sharpe, Stephen R. Yeandel, Chih-Han Yen, Konstantin V. Luzyanin, Pooja Goddard, Enrico A. Petrucco, Laurence J. Hardwick
Summary: Effective utilization of Li-metal electrodes is crucial for enhancing the specific energy of lithium-oxygen batteries. Through optimizing formulations based on solvent, salt, and ionic liquid, stable Li plating/stripping performances and improved performance in Li-O-2 full cells were achieved. Introducing non-volatile IL had negligible disrupting effects on critical stabilizing interactions between Li+ and DMSO.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Fei Chen, Changxiang Guo, Honghao Zhou, Muhammad Wakil Shahzad, Terence Xiaoteng Liu, Sokolskyi Oleksandr, Jining Sun, Sheng Dai, Ben Bin Xu
Summary: Polymer-based solid electrolytes (PSEs) show potential for developing lithium metal batteries due to their attractive features. However, their poor ionic conductivity requires high temperatures for charge and discharge. This study presents a gel polymer electrolytes (GPEs) film with a supramolecular network structure, offering high thermal stability, good mechanical property, and high ionic conductivity at room temperature.
Article
Chemistry, Multidisciplinary
Jun-Feng Liu, Zhan-Yu Wu, Florian J. Stadler, Yan-Fei Huang
Summary: The incorporation of ionic liquids (ILs) in solid-state polymer electrolytes (iono-SPEs) greatly enhances Li+ transport in polymer phases. By using a poly (vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) (PTC) as the framework of ILs, non-uniform Li+ transport among different phases is reduced. This is achieved through weaker adsorption energy of IL cations on PTC chains compared to PVDF and the higher dielectric constant of PTC facilitating the dissociation of Li-anions clusters. The LiFePO4/PTC iono-SPE/Li cells show stable cycling performance with high capacity retention after 1000 cycles at 1 C and 25 degrees C. This work provides a novel approach to induce uniform Li+ flux in iono-SPEs through polarity and dielectric design of the polymer matrix.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Analytical
Luigi Manfredy Marquina, Lyda La Torre Riveros, Victor Jauja Ccana, Golfer Muedas-Taipe, Mauricio Isaacs, Adolfo La Rosa-Toro
Summary: Including ionic liquids in polymeric electrolyte systems for batteries is an interesting approach to improve performance and safety, reduce costs, and enhance manufacturing efficiency.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Editorial Material
Mechanics
Ralph H. Colby
JOURNAL OF RHEOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Joshua E. Bostwick, Curt J. Zanelotti, Deyang Yu, Nicholas F. Pietra, Teague A. Williams, Louis A. Madsen, Ralph H. Colby
Summary: Molecular ionic composites (MICs) are a new class of solid electrolytes that combine ionic liquids (ILs) and a rigid-rod double helical polyelectrolyte, showing excellent mechanical properties and high ionic conductivities. The broad range of moduli and high tensile to shear modulus ratio in MICs are attributed to the distribution of PBDT chains and strong ionic interactions between IL ions and PBDT chains.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Abigail M. Fenton, Renxuan Xie, Melissa P. Aplan, Youngmin Lee, Michael G. Gill, Ryan Fair, Fabian Kempe, Michael Sommer, Chad R. Snyder, Enrique D. Gomez, Ralph H. Colby
Summary: The relationship between Kuhn length, Kuhn monomer volume, and plateau modulus for flexible polymers has a gap in experimental data. Conjugated polymers with a combination of backbone and side chains are ideal materials to study this crossover region. We have shown that certain polymers with aromatic backbones populate a large part of this gap and exhibit nematic ordering.
ACS CENTRAL SCIENCE
(2022)
Article
Chemistry, Physical
Deyang Yu, Linqin Mu, Xu Feng, Feng Lin, Louis A. Madsen
Summary: Polymer binders play a crucial role in battery electrodes, and a study has found that a rigid-rod polymer binder called PBDT can provide comparable performance to the traditional binder PVDF. Moreover, PBDT has the potential to eliminate fluorine from the electrode and reduce the need for organic solvents in processing, making it a sustainable option for advanced batteries.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Thermodynamics
Xiaoshi Zhang, Jason D. Alexander, Jiho Seo, Anne M. Gohn, Matthew J. Behary, Richard P. Schaake, Ralph H. Colby, Alicyn M. Rhoades
Summary: The interior structure of PEEK composite pellets was reconstructed using ultra-high-resolution X-ray computed tomography (XCT), and different slicing methods were analyzed. For samples with thickness less than 50μm, PEEK samples sliced perpendicular to the fiber flow direction showed good filler homogeneity and lower coefficient of variation compared to samples sliced along the fiber flow direction. This conclusion was supported by further studies on the crystallization kinetics of PEEK and its composites.
THERMOCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Deyang Yu, Diego Troya, Andrew G. Korovich, Joshua E. Bostwick, Ralph H. Colby, Louis A. Madsen
Summary: Lithium batteries rely on fast charge and mass transport of Li+ in the electrolyte. Quantification of Li+ transport in glycerol-salt electrolytes via NMR experiments and MD simulations reveals a surprising Li+-hopping mechanism. This system represents a bridge between liquid and inorganic solid electrolytes, motivating new molecular designs for fast-charging and all-solid-state batteries.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Joshua E. E. Bostwick, Deyang Yu, Curt J. J. Zanelotti, Theo J. J. Dingemans, Louis A. A. Madsen, Ralph H. H. Colby
Summary: Single-ion-conducting electrolytes, composed of rigid-rod polyanion poly(2,2'-disulfonyl-4,4'-benzidine terephthalamide) (PBDT), Na+/Li+ counterions, and poly(ethyleneglycol) (PEG), have been developed as solid-state electrolytes with high thermal stability. These materials show a significant increase in modulus and ionic conductivity with increasing PBDT content and PEG concentration, making them promising candidates for use in solid-state batteries. The combination of high cation conductivity and high modulus in LiPBDT-PEG membranes surpasses that of competing single-ion conductors at 30°C.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lei Tao, Joshua A. Russell, Dawei Xia, Bingyuan Ma, Sooyeon Hwang, Zhijie Yang, Anyang Hu, Yuxin Zhang, Poom Sittisomwong, Deyang Yu, Paul A. Deck, Louis A. Madsen, Haibo Huang, Hui Xiong, Peng Bai, Kang Xu, Feng Lin
Summary: Solid-electrolyte interphases (SEIs) in advanced rechargeable batteries can mimic the chemistry and structure of cell membranes, allowing for selective ion transport and regulating electrode reactions. Researchers have reported SEIs that exhibit thermally activated selective ion transport, functioning as open/close gate switches. This ion gating is achieved through Arrhenius-activated ion transport and SEI dissolution/regrowth. The understanding of this biomimetic property of SEIs can guide the design of better SEIs for future battery chemistries.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Polymer Science
Wenwen Mei, Deyang Yu, Louis A. Madsen, Robert J. Hickey, Ralph H. Colby
Summary: Understanding the dielectric response and charge transport in ion-containing polymers is crucial for their application in energy-related fields. In this study, the impact of anion chemical composition on ion conduction in poly(ethylene oxide)-based lithium ionomers was investigated using a four-state model. DFT calculations with the cluster-continuum solvation model revealed low cluster dissociation energy and explained the weakly aggregated morphology, indicating rapid exchange of Li+ between different ion states. These findings offer new insights for promoting ion conduction and dielectric response in single-ion conducting ionomers.
Article
Materials Science, Multidisciplinary
Wenwen Mei, Deyang Yu, Christy George, Louis A. Madsen, Robert J. Hickey, Ralph H. Colby
Summary: Maximizing ion conduction in single-ion-conducting ionomers is crucial for energy-related technologies. Understanding the impact of anion chemical composition on ion conduction emphasizes the necessity of minimizing ion aggregation through the rational choice of anion chemical composition.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)