Article
Biochemistry & Molecular Biology
Sha Fu, Xuanzhi Xie, Xiaoyi Huangyang, Longxi Yang, Xianxiang Zeng, Qiang Ma, Xiongwei Wu, Mingtao Xiao, Yuping Wu
Summary: Highly safe and stable lithium metal batteries with high energy density are in urgent need. The key to achieving stable battery cycling is to design novel nonflammable electrolytes with superior interface compatibility and stability. In this study, dimethyl allyl-phosphate and fluoroethylene carbonate were added to triethyl phosphate electrolytes as functional additives to stabilize the deposition of metallic lithium and enhance the electrode-electrolyte interface. The designed electrolyte exhibits high thermostability and flame-retarding characteristics compared to traditional carbonate electrolyte. Li| |Li symmetrical batteries with the designed phosphonic-based electrolytes show excellent cycling stability of 700 hours at 0.2 mA cm(-2), 0.2 mAh cm(-2). Additionally, the electrolytes demonstrate better interface compatibility with metallic lithium anodes, as observed from the smooth and dense-deposited morphology on the cycled Li anode surface.
Article
Nanoscience & Nanotechnology
Cheng Li, Guohua Liu, Kai Wang, Wei Dong, Jinlong Han, Yang Yu, Zhiwen Min, Chunlei Yang, Ziheng Lu
Summary: The quasi-solid Janus electrolyte based on ceramic LLZO and TMP gel has an extended electrochemical window to accommodate the lithium metal anode, while maintaining contact between the cathode and electrolyte through the semifluid nature of the TMP gel. This simple but effective strategy provides a safe, inexpensive, and energy-dense solution for solid-state batteries.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Multidisciplinary
Shouyi Yuan, Kai Ding, Xiaoyuan Zeng, Duan Bin, Yingjie Zhang, Peng Dong, Yonggang Wang
Summary: Batteries with a Li-metal anode have high energy density but suffer from severe dendrite growth, posing safety concerns due to the flammability of organic electrolytes. Nonflammable electrolytes, such as high-concentration electrolyte, fluorinated electrolyte, ionic liquid electrolyte, and polymer electrolyte, have shown potential in suppressing dendrite growth and enhancing battery performance. This review summarizes recent advances in developing nonflammable electrolyte for safer Li-metal batteries and analyzes the solvation structure to understand the mechanism for dendrite suppression and fire extinguishing. Furthermore, guidelines for future design of nonflammable electrolyte are provided.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Huaihu Sun, Jiandong Liu, Jian He, Huaping Wang, Gaoxue Jiang, Shihan Qi, Jianmin Ma
Summary: A non-flammable triethyl phosphate (TEP)-based electrolyte with tris(hexafluoroisopropyl)phosphate (THFP) as an additive has been developed. THFP helps to form a stable LiF-rich solid electrolyte interphase (SEI) layer, suppress lithium dendrite growth, and reduce electrolyte decomposition. THFP also participates in the formation of a stable electrolyte interphase (CEI) layer for stable cycling of the cathode.
Article
Chemistry, Multidisciplinary
Lijiang Tan, Shunqiang Chen, Yawei Chen, Jiajia Fan, Digen Ruan, Qingshun Nian, Li Chen, Shuhong Jiao, Xiaodi Ren
Summary: A rationally designed ether-based electrolyte with chlorine functionality is reported to address the issues of low anodic stability and high flammability in high-voltage lithium metal batteries. The chloroether-based electrolyte shows high Li Coulombic efficiency and capacity retention, and possesses nonflammable safety feature due to the flame-retarding ability of chlorine functional groups. This study offers a new approach for enabling ether-based electrolytes in high energy density, long-life, and safe Li metal batteries.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Kuirong Deng, Zelin Xu, Suping Zhou, Zheng Zhao, Kanglong Zeng, Min Xiao, Yuezhong Meng, Yonghang Xu
Summary: ED@PVDF, a nonflammable highly-fluorinated quasi-solid-state polymer electrolyte, exhibits ultra-high ionic conductivities, excellent flame-retardant properties, and superior cycling stability. It promotes the generation of LiF-rich solid electrolyte interphase and effectively suppresses dendrite growth on Li metal anodes.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Changxiang Guo, Yafei Cao, Junfeng Li, Haipeng Li, Senthil Kumar Arumugam, Sokolskyi Oleksandr, Fei Chen
Summary: Ionic liquid-based polymer electrolytes are a simple and effective approach to obtaining polymer solid electrolytes with high ionic conductivity, fast self-healing, and flame retardant properties, which are promising alternatives to address thermal runaway in lithium batteries.
Article
Nanoscience & Nanotechnology
Zelin Xu, Kuirong Deng, Suping Zhou, Zheng Liu, Xiongcong Guan, Daize Mo
Summary: A highly concentrated electrolyte has been developed for lithium metal batteries, which improves interface stability and cycle performance. This electrolyte also exhibits high safety and good compatibility with other materials.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Inorganic & Nuclear
Wei Li, Fengniu Lu, Xiaoling Zhang
Summary: This study explores the use of Mg-Al mixed oxides as alternative catalysts to promote the production of HFE-356mmz, finding that their efficiency is determined by the surface acid-base properties of the catalysts. These results provide evidence for a more universal and operable process using more common and less expensive catalysts.
JOURNAL OF FLUORINE CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Fuhe Wang, Jun Zhong, Yaqing Guo, Qigao Han, Honghao Liu, Jinqiao Du, Jie Tian, Shun Tang, Yuancheng Cao
Summary: Rechargeable lithium metal batteries (LMBs) show promise for high-energy-density battery systems. Fluorinated solvents were used to prepare gel polymer electrolytes (FGPE) that are compatible with both the lithium metal anode and LiNi0.8Co0.1Mn0.1O2 cathode. FGPE demonstrated stable plating/stripping processes and sufficient safety. This electrolyte design provides ideas to enhance the safety and energy density of LMBs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yeguo Zou, Gang Liu, Yuqi Wang, Qian Li, Zheng Ma, Dongming Yin, Yao Liang, Zhen Cao, Luigi Cavallo, Hun Kim, Limin Wang, Husam N. N. Alshareef, Yang-Kook Sun, Jun Ming
Summary: High-voltage lithium metal batteries, with their excellent energy density, face challenges from oxidation decomposition of electrolytes and uncontrolled lithium dendrite growth. A solvation structure engineering strategy is proposed to design a nonflammable fluorinated electrolyte, which demonstrates superior cycling stability for a LiNi0.8Co0.1Mn0.1O2 (NCM811)-based Li-metal battery. By tuning intermolecular interactions, the electrolyte and electrode performance can be stabilized, providing a pathway for electrolyte design in metal ion batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiaowei Mu, Xingjun Li, Can Liao, Hen Yu, Yi Jin, Bin Yu, Longfei Han, LeiKan Chen, Yongchun Kan, Lei Song, Yuan Hu
Summary: A stable and non-flammable gel polymer electrolyte (GPE) with low content of flame retardant was designed, which exhibited excellent fire resistance and stable electrochemical performance. A non-flammable pouch cell based on GPE was also prepared, showing good flexibility and outstanding fire safety.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Physical
Xiaowei Mu, Hongliang Ding, Yudong Wu, Haibo Hu, Bin Yu
Summary: Lithium-based batteries have shown great potential as energy-storage devices, but the flammable nature and poor electrochemical stability of traditional liquid electrolytes significantly hinder their further development. Therefore, it is crucial to develop nonflammable electrolytes. This work summarizes the recent progress in nonflammable liquid electrolytes, including flame-retardant-based electrolytes, highly concentrated electrolytes, localized high concentrated electrolytes, and ionic liquids-based electrolytes, and discusses the challenges and future perspectives of designing liquid electrolytes to decrease the fire hazard of lithium-based batteries.
Review
Electrochemistry
Guiomar Hernandez, Ronnie Mogensen, Reza Younesi, Jonas Mindemark
Summary: This review outlines the importance of fluorine in battery electrolytes, the problems it causes, and strategies to eliminate it. The examples provided demonstrate the possibility of creating fully fluorine-free electrolytes with similar performance, but improvements are still needed.
BATTERIES & SUPERCAPS
(2022)
Article
Chemistry, Physical
Yosuke Ugata, Kazuki Yukishita, Natsuho Kazahaya, Shingo Takahashi, Naoaki Yabuuchi
Summary: To improve the energy density and safety of Li-ion batteries, a nonflammable fluorinated ester, methyl 3,3,3-trifluoropropionate (MTFP), is evaluated as an electrolyte solvent. The use of MTFP-based electrolyte in Li/LiCoO2 cells showed superior capacity retention compared to conventional carbonate-based electrolyte. Moreover, the MTFP-based electrolyte improved the low-temperature performance and thermal stability of LiCoO2 electrodes.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lan Xia, Yabei Jiang, Yueyang Pan, Shiqi Li, Jason Wang, Yiting He, Yonggao Xia, Zhaoping Liu, George Z. Chen
Article
Electrochemistry
Lan Xia, Saixi Lee, Yabei Jiang, Shiqi Li, Zhaoping Liu, Linpo Yu, Di Hu, Shuhan Wang, Yitong Liu, George Z. Chen
Article
Energy & Fuels
Lan Xia, He Miao, Fu Wang, Chunfei Zhang, Jiatang Wang, Jiapei Zhao, Jinliang Yuan
Summary: The study found that electrolytes with TTE and HFPM as cosolvents exhibit significantly improved cycling and rate properties for Li/NCM811 cells cycled between 2.7 and 4.3 V, compared to FEC-based electrolyte solutions without a fluorinated ether cosolvent.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Chemistry, Physical
Lan Xia, He Miao, Chunfei Zhang, George Z. Chen, Jinliang Yuan
Summary: This review summarizes the latest research progress of fluorinated compounds used in high energy density lithium-ion batteries, with a focus on high-voltage functional fluorinated compounds. Researchers believe that this review will help develop the next generation of high energy density electrolyte systems.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Physical
Lan Xia, Mingming Chen, Fu Wang, He Miao, Jinliang Yuan
Summary: This study proposes a strategy of using partially fluorinated linear carboxylate esters (FLCEs) as co-solvents to prepare high voltage, nonflammable electrolytes. The study investigates the physical, chemical, and electrochemical properties of FLCEs solvents, as well as the electrochemical performances of high-voltage batteries using FLCEs-containing electrolytes. The results show that FLCEs have limited solubility for lithium salt LiPF6 and need to be mixed with other solvents to form stable electrolytes. FLCEs, particularly F-1, show promising potential as co-solvents for high voltage lithium-ion battery electrolytes with enhanced safety and longevity.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Zezhao Liu, Zhishan Liu, Kuihao Li, Xinzhe Zhao, Mingming Chen, He Miao, Lan Xia
Summary: In this study, a carbonyl-free TMP-based electrolyte was investigated to improve the cycling stability of LLO batteries, demonstrating an enhanced capacity retention compared to carbonate-based electrolytes.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Zezhao Liu, Qian Yu, Nischal Oli, Jose Fernando Florez Gomez, Shen Qiu, Haoran Tian, Qian Qiu, Wei Sun, Kuihao Li, Zhishan Liu, Mingming Chen, Jinliang Yuan, Xianyong Wu, Lan Xia
Summary: This study introduces a non-volatile, non-flammable, and thermo-reversible polymer/ionic liquid gel electrolyte as a built-in safety switch for lithium batteries, which provides highly precise and reversible thermal protection. The gel electrolyte blocks Li+ insertion reactions and prevents thermal runaway at high temperature, and restores its original properties at lower temperature.
ADVANCED ENERGY MATERIALS
(2023)
Article
Electrochemistry
Kehuang Wang, Mingliang Shangguan, Yibo Zhao, Haoran Tian, Fu Wang, Jinliang Yuan, Lan Xia
Summary: A flexible and stable Nisopropylacrylamide/sodium alginate (N-SA) gel electrolyte is reported, which enables the reversible cycling of Zn metal negative electrode and MnO2 positive electrode. The assembled Zn/N-SA/MnO2 batteries exhibit high specific capacity and remarkable capacity retention, showing potential for flexible batteries for wearable electronics.
Article
Electrochemistry
Mingliang Shangguan, Kehuang Wang, Yibo Zhao, Lan Xia
Summary: The addition of tetraethylene glycol dimethyl ether (TEGDME) to the Zn(CF3SO3)2 aqueous electrolyte resulted in an enhanced performance of aqueous zinc-ion batteries (AZIBs). The hybrid electrolyte showed an expanded electrochemical window, inhibited dendritic growth of Zn, and suppressed parasitic reactions. The experimental results demonstrated improved cycling stability and capacity efficiency in different types of batteries with the hybrid electrolyte.
Article
Electrochemistry
Bamidele Akinwolemiwa, Chaohui Wei, Qinghua Yang, Linpo Yu, Lan Xia, Di Hu, Chuang Peng, George Z. Chen
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2018)
