Article
Chemistry, Physical
Lorenzo Mezzomo, Nicolo Pianta, Irene Ostroman, Niv Aloni, Diana Golodnitsky, Emanuel Peled, Piercarlo Mustarelli, Riccardo Ruffo
Summary: New generation lithium batteries require better performances, improved safety, and sustainability. Deep Eutectic Solvents (DESs) made with 2,2,2-trifluoroacetamide (TFA) and LiPF6 show promise as safer and more environmentally sustainable electrolyte components. The DES composition tested against Li metal, LiFePO4 (LFP), and high voltage LiNi1-x-yMnxCoyO2 (NMC) demonstrates good electrochemical performance and improved thermal stability compared to a commercial liquid electrolyte.
JOURNAL OF POWER SOURCES
(2023)
Article
Electrochemistry
Brendan E. Hawkins, Harrison Asare, Brian Chen, Robert J. Messinger, William West, John-Paul Jones
Summary: This study investigates the failure mechanisms of lithium-ion batteries (LIBs) operating at 100 degrees C, identifies the causes of capacity fade, and demonstrates the potential of electrode replacement for improving performance at high temperatures. The findings are expected to guide the development of electrolyte formulations to enhance electrode interphase stability and enable the use of LIBs at temperatures as high as 100 degrees C.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Seung-Bo Hong, Young-Jun Lee, Un-Hyuck Kim, Cheol Bak, Yong Min Lee, Woosuk Cho, Hoe Jin Hah, Yang-Kook Sun, Dong-Won Kim
Summary: All-solid-state lithium batteries are promising alternatives to current lithium-ion batteries. Researchers have developed a solvent-free process to fabricate composite cathodes using an ionomer binder, which improves the battery's performance.
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Chen Wang, Xiaofan Du, Jiedong Li, Chao Wang, Shanmu Dong, Guanglei Cui
Summary: The interfacial chemistry between electrolytes with different concentrations and Li metal during plating/stripping is visualized using in situ Fourier transform infrared spectroscopy (FTIR) and simulated by density functional theory (DFT) calculations. It is confirmed that the evolution of Li+-solvent interaction at interfaces during stripping and plating processes determines the interfacial stability. This study reveals the crucial role of Li+-solvent interaction evolution in the stability of the interface between the solvent and Li metal anode.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Hyuntae Lee, Hyeongguk An, Hongjun Chang, Mingyu Lee, Seungsoo Park, Soyeon Lee, Jiwoong Kang, Seungwoo Byon, Bonhyeop Koo, Hochun Lee, Yong Min Lee, Janghyuk Moon, Sujong Chae, Hongkyung Lee
Summary: This study explores the safety risks of fast charging for Li-ion batteries and proposes a new electrolyte design to improve the cycling performance and capacity retention of the batteries.
ENERGY STORAGE MATERIALS
(2023)
Editorial Material
Materials Science, Multidisciplinary
Sheng Shui Zhang
Summary: Fast charging of Li-ion cells faces challenges including accelerated capacity fade and inferior charging capability. Apart from the well-known issues of Li plating and voltage polarization, there are hidden factors such as failure of the solid electrolyte interphase, structural degradation of cathode materials, and high activation energies of Li+ ions in the electrolyte. Understanding these factors can help propose solutions to the fast-charging problems.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Chemistry, Physical
Kanglong Guo, Chunlei Zhu, Huaping Wang, Shihan Qi, Junda Huang, Daxiong Wu, Jianmin Ma
Summary: Increasing the cut-off voltage of cathodes improves the energy density of Li||LiCoO2 batteries, but also leads to rapid battery degradation due to oxidation and deterioration. However, by using bis-(benzenesulfonyl)imide (BBSI) as an additive, a uniform and highly Li+ conductive cathode electrolyte interphase (CEI) is constructed, which stabilizes the batteries at 4.6 cut-off voltage and exhibits superior cycling and high-rate performance. The CEI, consisting of LiF and conductive Li+ moieties, improves Li+ migration, alleviates cathode degradation, and reduces other secondary degradation factors. Li||LiCoO2 batteries with 1% BBSI-containing electrolyte sustain 81.30% of initial capacity after 300 cycles at 0.5C, and 88.27% of initial capacity even after 500 cycles at 2C/3C.
ADVANCED ENERGY MATERIALS
(2023)
Article
Multidisciplinary Sciences
Shuoqing Zhang, Ruhong Li, Nan Hu, Tao Deng, Suting Weng, Zunchun Wu, Di Lu, Haikuo Zhang, Junbo Zhang, Xuefeng Wang, Lixin Chen, Liwu Fan, Xiulin Fan
Summary: The authors establish a mechanistic model to analyze the effect of solid electrolyte interphase (SEI) on realistic lithium plating in high-fluorine electrolytes. By designing an efficient electrolyte to generate a homogenous dual-halide SEI, the Coulombic efficiency of lithium metal batteries can be improved.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Fang Li, Jiandong Liu, Jian He, Yuyang Hou, Huaping Wang, Daxiong Wu, Junda Huang, Jianmin Ma
Summary: By introducing a hydrophobic Li+-solvated structure with a specific additive, the attack from water molecules on LiPF6 can be reduced, and the growth of lithium dendrites can be inhibited, leading to improved cycling stability and performance of lithium-metal batteries.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Elna J. K. Nilsson, Christian Brackmann, Annika Ahlberg Tidblad
Summary: With the increasing use of battery electric vehicles, fire incidents involving Li-ion batteries have become a growing concern. This study aims to enhance the understanding of the combustion process of gas mixtures vented from Li-ion batteries. Using simulation of ignition and laminar flames, the research reveals significant variations in laminar burning velocity, flame temperature, and heat release for different gas mixtures. Factors such as the content of carbonates, hydrogen gas, and inert carbon dioxide are found to be influential in laminar flames.
JOURNAL OF POWER SOURCES
(2023)
Article
Nanoscience & Nanotechnology
Pei-En Weng, Alexander Gooyandeh, Muhammad Tariq, Tianyu Li, Avinash Godara, Jocelyn Valenzuela, Steven Mancini, Samuel Ming Tuk Yeung, Ruth Sosa, David R. Wagner, Rohan Dhall, Nicole Adelstein, Katy Kao, Dahyun Oh
Summary: This study reports the first biodirected synthesis of carbonaceous layers on anodes to prevent direct contact of water molecules with anode particles. Utilizing high-aspect ratio microbes as precursors, the conductivity is enhanced and the electrolysis of WIS electrolytes is reduced.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Zunchun Wu, Ruhong Li, Shuoqing Zhang, Ling Lv, Tao Deng, Hao Zhang, Ruixin Zhang, Jiangjiang Liu, Shouhong Ding, Liwu Fan, Lixin Chen, Xiulin Fan
Summary: This study found that the coordination between Li+ and solvents determines the anodic stability of localized high-concentrated electrolytes (LHCEs) on high-voltage cathodes, which can be finely tuned by ambient diluents. Among the possible diluents, 2H,3H-decafluoropentane (HFC) was found to satisfy the principle of weak but sufficient interactions, which enhances Li+ coordination and offers excellent antioxidant chemistry. The study provides guiding principles for improving the cathodic and anodic stability of electrolytes, benefiting the development of LHCEs and inspiring next-generation lithium batteries formulation.
Article
Chemistry, Multidisciplinary
Yu-Xing Yao, Xiang Chen, Nan Yao, Jin-Hui Gao, Gang Xu, Jun-Fan Ding, Chun-Liang Song, Wen-Long Cai, Chong Yan, Qiang Zhang
Summary: The study reveals the influence of charge transfer kinetics on the fast rechargeability of Li-ion batteries. By addressing the charge transfer limitations at the electrode-electrolyte interface through electrolyte engineering, stable fast charging of high-energy Li-ion batteries is achieved.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Mengchuang Liu, Ziqi Zeng, Wei Zhong, Zicheng Ge, Longqing Li, Sheng Lei, Qiang Wu, Han Zhang, Shijie Cheng, Jia Xie
Summary: In this study, a non-flammable electrolyte with internal-external flame retardants is designed by introducing fluorobenzene as a cosolvent and bridge solvent in a high-concentration electrolyte system. This design successfully solves the safety concerns of lithium-ion batteries and achieves stable cycling.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Xiaoyi Hu, S. Ravi P. Silva, Peng Zhang, Kangli Liu, Shijie Zhang, Guosheng Shao
Summary: In this study, an asymmetric and structurally stable gel electrolyte system was developed to address the safety concerns in lithium-sulfur batteries. This gel electrolyte exhibited high ionic conductivity, flame-retardancy, and prevented the shuttling of polysulfides and formation of lithium dendrites. The use of polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) and SiO2-polyvinyl alcohol (SiO2@PVA) suspension in the gel electrolyte contributed to its excellent properties. The gel electrolyte showed a high initial capacity and cycling stability in a Li-S cell, making it a promising option for the development of safe, low-cost, and durable Li-S batteries.
CHEMICAL ENGINEERING JOURNAL
(2023)
