Article
Chemistry, Physical
Zhenghua Zhang, Jiugang Hu, Yang Hu, Hongmei Wang, Huiping Hu
Summary: This work investigates the effect of an advanced electrolyte additive on the performance of Ni-rich LiNixCoyMn1-x-yO2/graphite batteries. The results show that the additive induces the formation of robust electrolyte/electrode interphase, significantly improving the cycling performance and reducing the cell impedance. The capacity retention rate of the cells with the additive-based electrolyte can reach 90% after 600 cycles, which is considerably better than that of baseline batteries (70%). Mechanistic studies reveal that the additive suppresses the formation of fragile Li2CO3 and promotes the formation of more stable LiF, LixPOyFz, and additional organic phosphorus species on the electrode surface, thereby preventing cation disorder and irreversible phase transitions.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Chanhyun Park, Eunryeol Lee, Su Hwan Kim, Jung-Gu Han, Chihyun Hwang, Se Hun Joo, Kyungeun Baek, Seok Ju Kang, Sang Kyu Kwak, Hyun-Kon Song, Nam-Soon Choi
Summary: This study investigates the role of MA-C60 as an electrolyte additive in lithium-ion batteries and finds that it can deactivate reactive radical species and maintain the structural stability of the cathode, overcoming some challenges in using LiNi1-x-yCoxMnyO2 cathodes.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Chanhyun Park, Eunryeol Lee, Su Hwan Kim, Jung-Gu Han, Chihyun Hwang, Se Hun Joo, Kyungeun Baek, Seok Ju Kang, Sang Kyu Kwak, Hyun-Kon Song, Nam-Soon Choi
Summary: The study investigates the use of a fullerene with malonic acid moieties as an electrolyte additive to address challenges associated with the oxidation of residual lithium compounds, maintaining the stability of the cathode, and mitigating reactions with LiPF6.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Subin Lee, Taeeun Yim
Summary: This study investigates the use of fluorophenyl methyl sulfone as a surface modifier to improve the cycling performance of nickel-rich lithium layered oxides at high temperatures. The results show that the cell cycled with fluorophenyl methyl sulfone exhibits better cycling retention and suppresses the parasitic reactions associated with electrolyte decomposition by forming stable cathode-electrolyte interphases.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Tien Manh Nguyen, Do Youb Kim, Se-Hee Kim, Dong Wook Kim, Jungdon Suk, Yongku Kang
Summary: This research presents a viable strategy for developing high-energy-density aqueous batteries. A molecular crowding electrolyte is prepared by dissolving lithium bis(trifluoromethanesulfonyl)imide in a mixture of a small-molecular crowding agent (tetraethylene glycol) and H2O. The addition of succinonitrile (SN) widens the electrochemical stability window of the aqueous electrolyte and improves the ionic conductivity. The fabricated NMC811/Li4Ti5O12 full cell exhibits excellent performance in terms of energy density, Coulombic efficiency, and capacity retention.
MATERIALS TODAY ENERGY
(2023)
Article
Chemistry, Physical
Miao Chang, Fangyuan Cheng, Wen Zhang, Jia Xu, Yi Zhang, Tao Meng, Shixiong Sun, Yue Xu, Qing Li, Chun Fang, Jiantao Han, Yunhui Huang
Summary: Although nickel-rich layered lithium transition metal oxides are promising for high energy-density Li-ion batteries, they suffer from capacity fading and safety issues due to the unstable cathode-electrolyte interphase (CEI), especially at high voltage and temperature. A novel modification method is proposed to construct a protective antioxidant layer on the surface of LiNi0.8Co0.1Mn0.1O2 (NCM). This antioxidant layer scavenges free radicals and singlet oxygen, reducing interfacial side reactions, suppressing irreversible phase transitions, and improving stability. This modification strategy shows superior electrochemical performance and enhanced thermal stabilities, applicable to all layered transition metal oxide cathode materials.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yongkang Han, Yingchuan Zhang, Yike Lei, Dongdong Xiao, Jie Ni, Weiguang Lin, Pingwen Ming, Cunman Zhang, Qiangfeng Xiao
Summary: To address the issues of Ni-rich NCM, Al (CF3SO3)(3) was proposed as a solid electrolyte additive to regulate the CEI in single-crystalline NCM811. The facile oxidation of CF3SO3- and subsequent reactions with reactive species from NCM811 and electrolyte lead to the formation of a robust sandwich CEI film containing sulfur and aluminum species. This CEI film not only prevents electrolyte decomposition but also alleviates the formation of inactive rock-salt phase on NCM811 surface, resulting in a high-capacity retention of 91.5% after 200 cycles under 0.5 C.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Jing Zhang, Jiapei Li, Longhao Cao, Wenhua Cheng, Ziyin Guo, Xiuxia Zuo, Chao Wang, Ya-Jun Cheng, Yonggao Xia, Yudai Huang
Summary: In this study, a new approach called surface targeted precise functionalization (STPF) is proposed to enhance the structural stability and electrochemical performance of NCM811 cathode material. The approach involves coating the NCM811 particle surface with 3-aminopropyl dimethoxy methyl silane (3-ADMS) and precise deposition of ascorbic acid via an acid-base interaction. This method leads to the formation of an ultra-thin spinel surface layer and a stable cathode-electrolyte interface, improving the electrochemical kinetics and inhibiting crack propagation. This research provides a feasible route to enhance the practical applications of high-energy density lithium-ion battery technology.
Article
Chemistry, Physical
Ryan Brow, Anthony Donakowski, Alex Mesnier, Drew J. Pereira, K. Xerxes Steirer, Shriram Santhanagopalan, Arumugam Manthiram
Summary: Nickel-rich cathode materials, despite being a promising choice for electric vehicles, face challenges related to long-term cycle life retention and air stability. This study investigates the use of surface treatments, specifically the coating of LiNi0.9Mn0.05Al0.05O2 cathode materials with lithium phosphate, to improve their performance. The results show that low concentration phosphoric acid coating leads to delayed voltage decay and enhanced discharge capacity during high-voltage cycling.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Kwangeun Jung, Taeeun Yim
Summary: The addition of a calcium sulfate precursor during thermal treatment can create an artificial Ca- and SOx-functionalized CEI layer on the surface of Ni-rich NCM cathode materials, inhibiting electrolyte decomposition and improving cycling retention of lithium-ion batteries. The modified CEI layer effectively controls undesired surface reactions such as electrolyte decomposition and metal dissolution, leading to enhanced performance of the Ni-rich NCM cathodes.
Article
Nanoscience & Nanotechnology
Songyan Bai, Byunghoon Kim, Chungryeol Kim, Orapa Tamwattana, Hyeokjun Park, Jihyeon Kim, Dongwhan Lee, Kisuk Kang
Summary: The use of MOF gel separators in organic batteries can effectively address electrode dissolution and shuttle effect issues, improving cycle stability and capacity retention. This technology has great potential for various applications, as the pore size can be tailored to specific organic electrode materials.
NATURE NANOTECHNOLOGY
(2021)
Article
Chemistry, Physical
Luozeng Zhou, Siyi Qian, Cheng Yang, Tingting Han, Yuanzhe Song, Yuzhuo Jiang, Huahui Zhang, Jianqin Zhang, Linsen Li, Jie Liu, Tao Qian
Summary: This study reports on the effective synergistic effect of a BTFC and SN electrolyte in suppressing TM nickel ion dissolution in a nickel-rich lithium metal battery by building a reliable and protective electrode/electrolyte interface. The electrolyte manipulation strategy successfully improves the battery's cycling stability and capacity retention.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Chaeeun Song, Hyeongyu Moon, Kyungeun Baek, Chorong Shin, Kwansoo Lee, Seok Ju Kang, Nam-Soon Choi
Summary: Nickel-rich layered oxides have high potential as cathode materials for high-energy Li-ion batteries, but practical applications are hindered by issues such as metal dissolution and reactive compound formation. This study demonstrates that the supplementation of electrolyte with tert-butyldimethylsilyl glycidyl ether (tBS-GE) can inhibit the interfacial degradation of LiNi0.9CoxMnyAlzO2 (NCMA) cathode and graphite (Gr) anode caused by HF. The tBS-GE scavenges HF and stabilizes the electrode surfaces, while its reaction with CO2 suppresses battery swelling. Adding 0.1 wt% tBS-GE to the electrolyte leads to improved capacity retention and discharge capacity of the NCMA/Gr full cells.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yujing Bi, Yaobin Xu, Ran Yi, Dianying Liu, Peng Zuo, Jiangtao Hu, Qiuyan Li, Jing Wu, Chongmin Wang, Sha Tan, Enyuan Hu, Jingnan Li, Rebecca O'Toole, Liu Luo, Xiaoguang Hao, Subramanian Venkatachalam, Job Rijssenbeek, Jie Xiao
Summary: A new nanoscale phase separation process has been discovered to promote the growth and segregation of single crystal LiNi0.8Mn0.1Co0.1O2 (NMC811). This process occurs directly during high-temperature calcination without significant agglomeration. The conversion of transition metal hydroxide precursors into transition metal oxide intermediates before reacting them with lithium salt is the key factor.
ENERGY STORAGE MATERIALS
(2023)
Article
Electrochemistry
Lukman Noerochim, Suwarno Suwarno, Nurul Hayati Idris, Hermawan K. Dipojono
Summary: The exponential growth in production of electric vehicles has led to an increased demand for low-cost, high-performance lithium-ion batteries. However, concerns over the availability of cobalt, a high-cost and rare material used in high-nickel cathodes, may impact the price due to supply constraints. Developing cobalt-free high-nickel cathode materials, such as LiNi1-x-yMnxAlyO2, is necessary to address the reliance on cobalt and its high cost.
Article
Energy & Fuels
Sang Hoo Lim, Kwangeun Jung, Keon-Joon Lee, Junyoung Mun, Young-Kyu Han, Taeeun Yim
Summary: Ni-rich cathode materials have been under spotlight due to their high specific capacity, but suffer from inferior cycling performance due to undesired reactions in the cell. This study proposes triethanolamine borate (TEAB) as a functional additive to suppress electrolyte decomposition and inhibit Ni dissolution in Ni-rich cathodes, significantly improving cycling and safety performance. TEAB also effectively suppresses Ni dissolution by selectively scavenging fluoride species through a chemical reaction, leading to improved cycling stability and safety of the cell.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Van-Chuong Ho, Hyejin An, Meihua Hong, Suhyun Lee, Jineun Kim, Min Bum Park, Junyoung Mun
Summary: Research shows that surface coating of Ni-rich layered oxide cathodes can improve electrochemical performance, with the self-assembled ZrO2 coating enhancing surface stability and promoting high lithium ion diffusion.
Article
Energy & Fuels
Youngkwang Kim, Seonghun Jeong, Hyo Eun Bae, Artur Tron, Yung-Eun Sung, Junyoung Mun, Oh Joong Kwon
Summary: The study introduced a porous copper electrode that improves the initial coulombic efficiency and cycle stability of lithium batteries by removing residual copper sulfate salts, supporting the potential practical application of porous copper electrodes in lithium metal batteries.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Jihyun Jang, Toshinori Sugimoto, Tomonobu Mizumo, Jae-Myung Lee, Won-Seok Chang, Junyoung Mun
Summary: In order to improve the energy density of lithium metal batteries, researchers have used a dual-solvent system with a fluorinated ether with high oxidative stability as a co-solvent to increase the electrolyte oxidation stability. By increasing the concentration of the salt coordinated by DME, the oxidation stability of the electrolyte is enhanced, resulting in improved stability and cycle performance of the batteries.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Meihua Hong, Subin Lee, Van-Chuong Ho, Daon Lee, Seung-Ho Yu, Junyoung Mun
Summary: The electrochemical behavior of SEI formed by LiBOB on LCO is investigated at different cutoff voltages. LiBOB can suppress side reactions by forming SEI, but the SEI decomposes at high voltages, causing a decrease in electrochemical performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Van-Chuong Ho, Bao Tran Duy Nguyen, Hai Yen Nguyen Thi, Jeong F. Kim, Junyoung Mun
Summary: Modifying the PE separator with dopamine can enhance its hydrophilicity in liquid electrolytes, leading to improved performance in NIBs, including high ionic conductivity and long cycle life.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Suhyun Lee, Jihyun Jang, Daon Lee, Jaemin Kim, Junyoung Mun
Summary: The study focuses on improving the energy density of aqueous rechargeable lithium-ion batteries (ARLBs) by constructing ultra-thick millimeter-scale LiFePO4 (LFP) electrodes. Enhanced electrolyte conductivity helps mitigate sluggish electrochemical behavior, allowing for improved cycle performance and rate capability.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Chemistry, Multidisciplinary
Van-Chuong Ho, Hana Lim, Myung Jun Kim, Junyoung Mun
Summary: This study presents an approach to improve the performance of aqueous zinc-ion batteries (ZIBs) and discusses the causes of side reactions and dendrite formation, as well as the correlation between the zinc metal anode, electrolyte, separators, and the performance of ZIBs. This research sheds light on the challenges associated with constructing high-performance ZIBs and is of significant importance for practical implementation.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Energy & Fuels
Van-Chuong Ho, Si Hyoung Oh, Junyoung Mun
Summary: In this study, a binder-free manganese oxide cathode electrode for rechargeable aqueous zinc ion batteries (AZIBs) was proposed. The cathode materials exhibited high capacity, reversible charge/discharge performance, and high rate performance. Factors influencing the electrochemical performance of the cathode materials were also investigated.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Ji Woo Han, Bo Keun Park, So Yeon Yang, Jimin Lee, Junyoung Mun, Jang Wook Choi, Ki Jae Kim
Summary: Using a PVDF film to coat zinc metal in zinc symmetric cells can improve the cyclability, corrosion resistance, and stability of zinc deposition.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Jineun Kim, Suhyun Lee, Seonghun Jeong, Meihua Hong, Van-Chuong Ho, Yeong Don Park, Ki Jae Kim, Junyoung Mun
Summary: This study focuses on controlling the binder adhesion of poly(vinylidene fluoride) (PVDF) to improve the volume changes of Ni-rich cathode materials. A simple heat treatment at 200 degrees C enhances the binding force by altering the nanoscale alignment of PVDF. The electrochemical properties of the Ni-rich cathode with different levels of binder adhesion are evaluated to determine the optimal conditions for high performance.
Review
Chemistry, Physical
Seonghun Jeong, Yuankai Li, Woo Hyeong Sim, Junyoung Mun, Jung Kyu Kim, Hyung Mo Jeong
Summary: All-solid-state batteries (ASSBs) are attracting considerable attention due to their safety and high energy density, which meet the requirements of emerging battery applications. Current research focuses on utilizing high-energy negative electrode materials and reducing the amount of electrolyte to achieve high energy density in ASSBs. Sulfide-based ASSBs with high ionic conductivity and low physical contact resistance are gaining interest. This review summarizes various anode materials for ASSBs operating under electrochemically reducing conditions, and discusses strategies for mitigating interfacial failures through interlayer and electrode design.
Article
Electrochemistry
Jin Kyo Koo, Younghoon Yun, Jae Kwon Seo, Sung Hoon Ha, Dong Won Kim, Junyoung Mun, Young-Jun Kim
Summary: The pressure on electrodes in cells greatly affects their active material density and electronic conductivity. A single-layer pouch cell (60mAh) was used to study the electrochemical effects of external pressures ranging from 0 to 3 MPa. The high-pressure cell at 3 MPa showed poor capacity retention due to Li plating and pore-clogging on the graphite electrode. However, the optimized pressed cell did not hinder Li-ion transport in the graphite anode and achieved 82% capacity retention after 200 cycles. External pressure affects the electrode-electrolyte contact, but excessive pressure hinders the supplement of Li ions into the graphite anode, leading to increased polarization, electrolyte side reactions, and Li-metal deposition.
ELECTROCHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Ji Woo Han, Bo Keun Park, Yong Min Kim, Yoonbo Sim, Van-Chuong Ho, Junyoung Mun, Ki Jae Kim
Summary: The modification of electrolyte is an effective method to stabilize Li metal anodes and suppress dendrite growth. In this study, we introduced KTFSI as an electrolyte additive for Li metal batteries, which provided an electrostatic shielding effect. By analyzing and experimenting, we identified the optimal concentration of KTFSI that successfully suppressed Li dendrite growth. The potassium cation controlled the Li deposition behavior and resulted in the surface stabilization of Li metal anode. The designed electrolyte showed outstanding performance compared to the LiTFSI electrolyte in electrochemical testing.
MATERIALS CHEMISTRY FRONTIERS
(2023)
