Article
Chemistry, Multidisciplinary
Kiho Nishioka, Mizuki Tanaka, Hayato Fujimoto, Toru Amaya, Sensuke Ogoshi, Mamoru Tobisu, Shuji Nakanishi
Summary: In addition to sufficient tolerance against superoxide radical attack, other factors also play a crucial role in the cyclability of Li-O2 batteries. The use of N,N-dimethylacetamide-based electrolyte can enhance the cyclability by quenching O-1(2) and forming highly decomposable Li2O2.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Jing Lian, Wei Guo, Yongzhu Fu
Summary: Benzenedithiols have been successfully used as electrolyte additives to limit the shuttle effect of lithium polysulfides in lithium-sulfur batteries, forming a stable solid-electrolyte interphase to enhance battery performance.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Analytical
O. Tripachev, N. Panchenko, O. Korchagin, M. Radina, S. Dolgopolov, O. Yu Grafov, V. A. Bogdanovskaya
Summary: The Pt/MoS2/CNT composite catalytic system synthesized using the polyol method shows excellent performance in a lithium-oxygen battery (LOB), including lowering the charge voltage, increasing the discharge capacity, and improving cycling stability. Compared to the MoS2/CNT catalyst, this composite system also exhibits higher activity and reversibility.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Xiaoxin Xie, Zhaoxu Wang, Shuang He, Kejun Chen, Qiu Huang, Peng Zhang, Shu-Meng Hao, Jiantao Wang, Weidong Zhou
Summary: This study investigates the application of ester-modified solid polymer electrolytes (SPEs), including poly-carbonate (PCE), poly-oxalate (POE), and poly-malonate (PME), in all-solid-state (ASS) batteries. The Li+-conductivity of these SPEs, prepared from pentanediol, is higher than those made of butanediol due to enhanced asymmetry and flexibility. PME and POE exhibit Li+-conductivity around 10 and 5 times that of PCE, respectively, thanks to their stronger chelating coordination with Li+. The use of trifluoroacetyl terminated POE and PCE as SPEs stabilizes the interfaces with Li-metal and high-voltage-cathode simultaneously, enabling stable cycling of ASS Li/LiNi0.6Co0.2Mn0.2O2 (NCM622) cells. The cycling stability of Li/PME/NCM622 is deteriorated due to enol isomerization of malonate, which is recovered by introducing a dimethyl-group in malonate and suppressing enol isomerization. The coordinating capability with Li+, molecular asymmetry, and existing modes of elemental F are critical for the molecular design of SPEs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Kunyao Peng, Pei Tang, Qianqian Yao, Qingyun Dou, Xingbin Yan
Summary: In this study, N-fluoropyridinium (ArF+) bis(trifluoromethane)sulfonimide (TFSI-) was added as an electrolyte additive to protect lithium metal through both solid electrolyte interphase (SEI) protection and electrostatic repulsion mechanisms. The ArF+ cations formed a protective SEI layer on the lithium surface and acted as a cationic repellent during lithium deposition, leading to improved cycle performance of lithium symmetric cells and lithium parallel to LiFePO4 full cells.
Article
Multidisciplinary Sciences
Mokwon Kim, Hyunpyo Lee, Hyuk Jae Kwon, Seong-Min Bak, Cherno Jaye, Daniel A. Fischer, Gabin Yoon, Jung O. Park, Dong-Hwa Seo, Sang Bok Ma, Dongmin Im
Summary: A newly proposed strategy involves designing a highly conductive ruthenium-based composite as a carbon-free cathode to improve the cycle life and capacity of solid-state lithium-oxygen batteries. By utilizing this approach, the batteries achieved a specific capacity of 200 milliampere hour per gram over 665 discharge/charge cycles, showcasing a notable improvement compared to existing cathodes.
Article
Chemistry, Multidisciplinary
Fengling Zhang, Jingning Lai, Zhengqiang Hu, Anbin Zhou, Huirong Wang, Xin Hu, Lijuan Hou, Bohua Li, Wen Sun, Nan Chen, Li Li, Feng Wu, Renjie Chen
Summary: In this study, a dilute electrolyte containing crown ether additives was tailored to improve the performance of lithium-oxygen batteries (LOBs) by promoting lithium salt dissociation and solvation of Li+ ions. This electrolyte exhibited enhanced electrochemical stability and triggered a solution-mediated Li2O2 growth pathway, leading to a high discharge capacity of 10 828.8 mAh g(carbon)(-1). Furthermore, optimized electrode/electrolyte interfaces promoted the kinetics of oxygen reduction/evolution reactions (ORR/OER) and achieved a dendrite-free Li anode, improving the cycle life of LOBs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Hongyang Li, Ling Li, Jingang Zheng, Hao Huang, Han Zhang, Baigang An, Xin Geng, Chengguo Sun
Summary: A convenient and efficient strategy is proposed to construct a Li3N-based interlayer between solid poly(ethylene oxide) (PEO) electrolyte and Li anode by in situ thermal decomposition of 2,2 '-azobisisobutyronitrile (AIBN) additive. The Li3N nanoparticles evolved from the decomposition can combine with LiF, cyano derivatives, and PEO electrolyte to form a buffer layer during the cell cycle, which improves the stability and homogeneity of Li deposition. The Li||Li symmetric cells with Li3N-based interlayer exhibit excellent cycle stability, with a cycle life at least 4 times longer than that of PEO electrolytes without Li3N layer. This work provides a convenient strategy for interface engineering in solid-state polymer electrolyte and Li anode.
Article
Chemistry, Physical
Jingning Lai, Nan Chen, Fengling Zhang, Bohua Li, Yanxin Shang, Liyuan Zhao, Li Li, Renjie Chen
Summary: This study found that using the tri-functional additive IMPBr can solve the slow kinetics problem of ORR and OER in Li-O-2 batteries, as well as protect the lithium metal anode. It has the ability to bind with O-2(-) and Li+ and serves as a catalyst for decomposition and prevention of solvents and side reactions during discharge and charge processes. The synergy effect of IMP+ and Br- can improve the cycle and rate performance of the battery.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Mao An, Huimin Wang, Wenjie Cheng, Guoran Li, Sheng Liu, Xueping Gao
Summary: A composite Li electrode with lithium-bismuth and lithium-indium alloys as the lithium host is fabricated to address the issues of dimensional instability, Li dendrite growth, and low Coulombic efficiency of Li metal anodes. The composite electrode shows remarkable electrochemical performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Mengyuan Song, Changhao Tian, Chunguang Chen, Tao Huang, Aishui Yu
Summary: Lithium-oxygen batteries have high energy density, but conventional liquid electrolytes struggle to form a stable solid electrolyte interface (SEI) on the cathode surface for long-term stable cycling. LiBOB is added to the LiTFSI-based electrolyte to solve this issue. The introduction of LiBOB induces the dissociation equilibrium of the lithium salt positively, resulting in an electrolyte with good ionic conductivity. Different amounts of LiBOB exhibit different characteristics in electrochemical performance, with trace amounts improving discharge capacity. The synergistic effect of the LiTFSI-LiBOB dual-salt electrolyte forms a protective SEI, leading to comparable cycling performance.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Wei Zhang, Fenfen Ma, Qiang Wu, Zhaohui Cai, Wei Zhong, Ziqi Zeng, Shijie Cheng, Jia Xie
Summary: In this study, a bifunctional electrolyte additive, 1,4-difluoroanthraquinone (DFAQ), is proposed to control lithium deposition and accelerate sulfur redox kinetics in lithium-sulfur (Li-S) batteries. DFAQ forms a solid electrolyte interphase (SEI) rich in LiF, allowing reversible lithium plating/stripping, suppressing dendrite growth, and protecting the lithium anode from side reactions with lithium polysulfides (LiPSs). Additionally, DFAQ acts as a redox mediator, promoting the conversion of LiPSs and enhancing the performance of Li-S batteries.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Junghwan Kim, Junghyun Choi, Patrick Joohyun Kim
Summary: Li-metal batteries (LMBs) have attracted renewed interest due to their high specific capacity and low operating potential, which can help overcome the limitations of conventional Li-ion batteries. However, poor coulombic efficiency and dendritic Li formation pose challenges for the commercial use of Li-metal anodes. Among various strategies, the utilization of 3D current collectors, specifically carbon nanotubes (MWNTs), has shown promising results in improving the electrochemical stability of LMBs. The MWNT current collector facilitates uniform and stable Li deposition, thereby reducing the growth of dendritic Li and contributing to the stable operation of Li-metal cells at high current densities.
Article
Chemistry, Physical
Samprash Risal, Chaoshan Wu, Fei Wang, Sandesh Risal, Francisco C. Robles Hernandez, Weihang Zhu, Yan Yao, Zheng Fan
Summary: As an interlayer in all-solid-state lithium metal batteries (ASSLMBs), the silver-carbon (Ag-C) nanocomposite can significantly enhance the energy density and cycle rate. However, the regulation of lithium plating and stripping by the Ag-C interlayer and the structural and chemical instabilities between the interlayer and the electrolyte or substrate may cause cell failure. This review discusses the interfacial issues and recent progress in solution strategies, with a focus on Ag-C nanocomposite interlayer in anode-free setups, and provides future prospects for improving interlayer techniques in solid-state batteries.
Article
Materials Science, Multidisciplinary
Zhenglin Hu, Chen Wang, Chao Wang, Bingbing Chen, Chunpeng Yang, Shanmu Dong, Guanglei Cui
Summary: The solid electrolyte interphase (SEI) plays a critical role in determining the interfacial stability of lithium metal anode. Research compared a diluted electrolyte and a super-concentrated electrolyte, finding that the latter results in a more compact SEI structure due to reduced solubility and outstanding formation kinetics. This work provides new insights into the superior performance of super-concentrated electrolyte in lithium metal batteries.
