Article
Electrochemistry
Jialong Wang, Md Monirul Islam, Scott W. Donne
Summary: This study describes a modified Swagelok electrochemical cell to characterize individual electrode behavior in the non-aqueous Li-LiMn2O4 system. The outcomes include variations in lithium negative electrode potential with applied current, lithium corrosion and passivation in the electrolyte, and LiMn2O4 dissolution with cycling, revealing Mn(III) as the dissolution product. The application of this technique to other systems, such as electrode materials and electrolytes, is also discussed.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Yuan Zhong, Peng Huang, Wen Yan, Zhong Su, Chuang Sun, Yimin Xing, Chao Lai
Summary: A reliable solid-electrolyte interphase (SEI) connected by polytitanosiloxane (PTS) was constructed in this study, resulting in ultra-stable cycling performance of Li metal batteries with TEOS/TEOT electrolyte additives. This research offers a new method for regulating the interfacial properties of Li anodes.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Jimin Oh, Gun Park, Hongjun Kim, Sujung Kim, Dong Ok Shin, Kwang Man Kim, Hye Ryung Byon, Young-Gi Lee, Seungbum Hong
Summary: In this study, we investigate the relationship between the content of solid electrolytes and irreversible capacity in composite electrodes. We analyze the variations of chemical composition and morphology in the solid electrolyte interphase (SEI) layer on the electrodes using electrochemical strain microscopy (ESM) and X-ray photoelectron spectroscopy (XPS). The results show that the solid electrolyte content affects the thickness of the SEI layer and the chemical distributions of Li and F ions, which in turn affect the Coulombic efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Yumi H. Ikuhara, Xiang Gao, Kazuaki Kawahara, Craig A. J. Fisher, Akihide Kuwabara, Ryo Ishikawa, Hiroki Moriwake, Yuichi Ikuhara
Summary: In this report, changes in epitaxial LiMn2O4 thin films during the initial charge-discharge cycles were analyzed to gain insights into its electrochemical behavior. The study found that defect-rich LiMn2O4 surfaces significantly contribute to the increased resistivity of the battery, while sequences of stacking faults impede Li-ion migration, resulting in capacity fading. These findings highlight the importance of minimizing defect formation in spinel cathodes to improve cycle performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Naufal Hanif Hawari, Huiqing Xie, Achmad Prayogi, Afriyanti Sumboja, Ning Ding
Summary: Anode-free lithium-metal batteries (AFLMBs) have the potential to double the energy density of Li-ion batteries, but face challenges with lithium plating and unstable solid electrolyte interphase (SEI). This study investigates the effect of using different conducting salts in AFLMBs by conducting XPS depth profile analysis and EIS. The results show that using LiDFOB-based electrolyte promotes the formation of an inorganic-rich SEI layer, resulting in better Li plating reversibility and stable charge/discharge voltage profile.
Article
Chemistry, Physical
Hideaki Oka, Hiroaki Kadoura, Naoko Takechi Takahashi, Taiji Ikawa
Summary: Coating graphite negative electrodes with amorphous carbon layer can enhance the performance of lithium-ion batteries. The amorphous carbon coating affects the formation of a solid electrolyte interphase (SEI) on the graphite surface, reducing the specific surface area and irreversibility of the first charge/discharge cycle. The amorphous carbon coating increases the amounts of F and O atoms on the SEI surface and reduces capacitance C' and Faraday current at high temperatures.
JOURNAL OF POWER SOURCES
(2022)
Article
Nanoscience & Nanotechnology
Christofer Sangeland, Guiomar Hernandez, Daniel Brandell, Reza Younesi, Maria Hahlin, Jonas Mindemark
Summary: Proper understanding of the formation of solid polymer electrolyte electrode interfacial layer and its impact on cell performance is crucial for practical solid-state lithium-ion batteries. However, probing these solid-solid interfaces is challenging. This study combines electrochemistry and spectroscopic analysis to evaluate the electrochemical stability window of a polyester-based electrolyte and demonstrates the formation of resistive interphase layers at the electrode-electrolyte interface.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Rui Guo, Dongniu Wang, Lucia Zuin, Betar M. Gallant
Summary: Research has shown that the SEI interfaces on Li anodes can undergo significant chemical evolution when exposed to different electrolytes, and the selection of electrolytes is crucial to improve transport in ionic-rich Li interfaces.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Yinguang Chai, Wenshan Jia, Zhiqiu Hu, Song Jin, Hongchang Jin, Huanxin Ju, Xingbin Yan, Hengxing Ji, Li-Jun Wan
Summary: The mechanical properties of the solid electrolyte interphase (SEI) in lithium ion batteries are found to vary depending on the electrolyte conditions, which is attributed to differences in chemical composition.
CHINESE CHEMICAL LETTERS
(2021)
Article
Electrochemistry
Yasuhito Aoki, Shiho Oda, Mami Oda, Miyuki Ogawa, Taihei Ishihama, Takayuki Doi, Minoru Inaba
Summary: The study found that in highly concentrated lithium salt electrolyte, both graphite and NCM523 electrodes formed inorganic-based surface films, showing high coulombic efficiency and capacity retention during charge/discharge cycles, but resulting in a significant increase in interfacial resistance.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Shaojie Zhang, Jiajia Ye, Huaisheng Ao, Mingying Zhang, Xilong Li, Zhibin Xu, Zhiguo Hou, Yitai Qian
Summary: In this study, a hierarchical solid-electrolyte interphase was developed on the zinc anode, which consisted of an inner ultrathin ZnF2 interface, metallic In layer, and outer InF3 layer. The ZnF2 interface promoted uniform zinc deposition and inhibited dendrite growth, while the metallic In and InF3 layers acted as corrosion inhibitors. The prepared zinc anode demonstrated dendrite-free zinc plating/stripping for over 6,000 hours and showed high cycle stability when coupled with the MnO2 cathode.
Article
Chemistry, Multidisciplinary
Peifa Yang, Zhuanfang Bi, Yang Shang, Ke Chen, Yaowen Liang, Xiao Li, Guangyi Shang
Summary: The evolution of the mechanical properties of LiMn2O4 during charge/discharge cycles is examined at the nanoscale using bimodal atomic force microscopy. The study reveals that the topographic change and elastic modulus degradation of the LiMn2O4 films occur simultaneously and irreversibly, with a dramatic decrease in elastic modulus observed within the first 10 cycles. The reasons for elastic modulus degradation are discussed in relation to nanoscale phenomena and macroscopic measurement results.
Article
Materials Science, Ceramics
Dandan Liu, Zhi Su, Lei Wang
Summary: The study used pyrometallurgical techniques to regenerate LiMn2O4 cathode materials from recovered cathode scraps, resulting in materials with good electrochemical performance after calcination. This low-cost and environmentally friendly process has the potential to recover other cathode scrap materials, providing a new pathway for recycling of old battery materials.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Yuhan Liu, Yuting Yao, Xinyue Zhang, Christopher Blackman, Robin S. Perry, Robert G. Palgrave
Summary: Thin films of tellurium-based vacancy-ordered perovskites were deposited onto transparent conducting substrates using aerosol-assisted chemical vapor deposition. The stability of the electrodes and photoelectrodes was tested, and it was found that the formation of a solid electrolyte interphase on the surface of Cs2TeI6 enhanced electrode stability, while (CH3NH3)2TeI6 degraded rapidly.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Guanjie Lu, Menghong Li, Peng Chen, Weikang Zheng, Zuguang Yang, Ronghua Wang, Chaohe Xu
Summary: A composite lithium anode (CLA) was designed and prepared to solve the obstacles of huge interfacial resistance and growth of detrimental Li dendrites in solid-state lithium metal batteries (SSLMBs). The CLA significantly improved the intrinsic ionic diffusion capability of the lithium anode and simultaneously enhanced the wettability of the anode towards solid-state electrolyte, resulting in a robust and high ionic conductive solid-state interface. The SSLMB with the CLA achieved excellent cycling performance and high-rate capability, demonstrating its potential for high-performance solid-state Li metal batteries.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)