Article
Chemistry, Multidisciplinary
Wanli Gao, Martin Pumera
Summary: A novel surface engineering method is proposed in this study to enhance the electrochemical activity of 3D-printed carbon materials by incorporating conductive poly(ortho-phenylenediamine) (PoPD). Experimental results demonstrate that this method can fabricate battery cathode materials with excellent discharge performance and cycling stability.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Mengying Ma, Haoran Cai, Chenlu Xu, Renzhi Huang, Shurong Wang, Huilin Pan, Yong-Sheng Hu
Summary: Regulating the structure and chemical properties of the solid electrolyte interface (SEI) on electrode materials, specifically using hard carbon as a platform material, can enable fast and stable Na+ storage in Na-ion batteries. The combination of a layer-by-layer SEI structure and a pseudo-SEI layer can improve the energy storage performance of electrode materials.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Shiqiang Wei, Shuangming Chen, Xiaozhi Su, Zhenghang Qi, Changda Wang, Babu Ganguli, Pengjun Zhang, Kefu Zhu, Yuyang Cao, Qun He, Dengfeng Cao, Xin Guo, Wen Wen, Xiaojun Wu, Pulickel M. Ajayan, Li Song
Summary: This study demonstrates the buffer role of Mn in an aqueous Zn-ion battery cathode, which stabilizes the electrode structure and modulates the Fermi surface by migrating Mn ions, leading to improved battery performance and cycling stability.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Energy & Fuels
Yudong Zhang, Peng Wei, Bo Zhou, Hongshun Zhao, Zihao Wang, Jianmin Ma, Yurong Ren
Summary: In this study, ethoxy(pentafluoro)cyclotriphosphazene (PFPN) was used as an electrolyte additive to construct a stable electrolyte interphase, which could suppress gas generation and cathode corrosion in lithium-ion batteries. The addition of PFPN also improved the wettability of the separator and exhibited a flame-retardant effect.
Review
Chemistry, Multidisciplinary
Xiaoxia Gou, Zhenkun Hao, Zhimeng Hao, Gaojing Yang, Zhuo Yang, Xinyue Zhang, Zhenhua Yan, Qing Zhao, Jun Chen
Summary: This review summarizes the in situ surface reconstruction strategies of lithium-rich manganese-based layered oxides (LROs). It provides an overview of LROs and discusses the surface challenges they face. Emphasis is placed on in situ self-reconstruction strategies to alleviate the performance degradation of LROs, with a focus on synthesis and characterization methods and the role they play in stabilizing the structures. Finally, prospects for precise/large scale preparations, interphase design, and in-operando characterization approaches for the commercialization of LROs are provided.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Franziska Allgayer, Julia Maibach, Fabian Jeschull
Summary: Graphite in potassium-ion batteries shows a faster capacity fade compared to lithium-ion batteries, possibly due to the reactivity of the potassium metal counter electrode or the instability of the solid electrolyte interphase. Previous studies have focused on different electrolyte formulations or charge states of graphite electrodes in potassium half cells. This study compares the surface layers in both charged and discharged states of lithium and potassium half cells, revealing significant differences in SEI composition.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xinyan Li, Ang Gao, Zhexin Tang, Fanqi Meng, Tongtong Shang, Shengnan Guo, Jiarun Ding, Yanhong Luo, Dongdong Xiao, Xuefeng Wang, Dong Su, Qinghua Zhang, Lin Gu
Summary: The study reports that surface reconstruction induced by specific antisites can suppress the outward migration of transition metals and oxygen ions, achieving a stable surface structure for layered oxide cathodes of lithium-ion batteries.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Chao Huang, Zou-Qiang Fang, Zhi-Jie Wang, Jian-Wei Zhao, Shi-Xi Zhao, Li-Jie Ci
Summary: Li-rich high-Mn material Li1.7Mn0.8Co0.1Ni0.1O2.7 (HM-811) showed improved electrochemical performance with morphology regulation and LiAlF4 coating, providing a new approach for developing high performance cathode materials for next-generation Li-ion batteries.
Article
Chemistry, Multidisciplinary
Taiping Hu, Jianxin Tian, Fuzhi Dai, Xiaoxu Wang, Rui Wen, Shenzhen Xu
Summary: The Li ion transport mechanism in amorphous LiF and Li2CO3, the major inorganic components of the solid electrolyte interphase (SEI), is investigated through machine-learning-potential-assisted molecular dynamics simulations. Results show that the Li ion diffusivity in amorphous LiF at room temperature cannot be accurately predicted based on high temperature diffusivities. The formation of Li-F regular tetrahedrons at low temperatures greatly suppresses the Li ion diffusivity, suggesting that designing an amorphous bulk LiF-based SEI is not beneficial for Li ion transport.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Daniel Commandeur, Christian Sabado, Thomas E. Ashton, Jawwad A. Darr
Summary: A combinatorial library of twenty-three phase pure near-NMC111 compositions was synthesized and their electrochemical performance was investigated. The sample with a Ni:Mn:Co ratio of 39:28:33 exhibited the highest specific capacity, while the sample with a ratio of 47:25:28 showed the best capacity retention characteristics.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Physical
Yanchen Liu, He Zhu, Hekang Zhu, Yang Ren, Yizhou Zhu, Yalan Huang, Liang Dai, Shuming Dou, Jie Xu, Cheng-Jun Sun, Xun-Li Wang, Yida Deng, Qunhui Yuan, Xingjun Liu, Junwei Wu, Yanan Chen, Qi Liu
Summary: This study proposes a strategy to improve the reversibility of anionic redox by tuning the geometric shape of surface ligands, leading to significantly improved capacity and voltage retention in the cathode material of lithium-ion batteries.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Liguang Wang, Xincheng Lei, Tongchao Liu, Alvin Dai, Dong Su, Khalil Amine, Jun Lu, Tianpin Wu
Summary: The study proposes a strategy to enhance the electrochemical performance of Ni-rich layered oxides by leveraging low-strain analogues of Li- and Mn-rich layered oxides to reconstruct the surface. The new surface structure with gradient chemical composition and defect-rich structure facilitates lithium diffusion and stabilizes the crystal structure, leading to improved cycling stability and capacity retention of the batteries.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Sandipan Maiti, Hadar Sclar, Judith Grinblat, Michael Talianker, Yuval Elias, Xiaohan Wu, Aleksandr Kondrakov, Doron Aurbach
Summary: In this study, three types of surface coatings based on adsorption of organic aromatic acids or their Li salts were applied to engineer the surface properties of high voltage LiNi0.5Mn1.5O4 (LNMO) spinel cathodes. The coatings significantly improved the capacity retention, rate performance, and cycling performance of the batteries, while reducing detrimental cation dissolution and ensuring structural stability at elevated temperatures.
Article
Chemistry, Physical
Pallavi Thakur, Khorsed Alam, Prasenjit Sen, Tharangattu N. Narayanan
Summary: By incorporating -OH functionalities into the cathode through polysaccharide addition, the discharge capacity and cyclability of Li-O2 batteries are enhanced. This rational design route provides high capacities for the emergent Li-O2 batteries.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Tianju Fan, Yujie Wang, Villa Krishna Harika, Amey Nimkar, Kai Wang, Xiaolang Liu, Meng Wang, Leimin Xu, Yuval Elias, Hadar Scalar, Munseok S. Chae, Yonggang Min, Yuhao Lu, Netanel Shpigel, Doron Aurbach
Summary: LiCoO2 (LCO) is a widely studied cathode material for Li-ion batteries, but its charging to high potentials leads to rapid degradation. In this study, the authors propose a surface coating method using RbAlF4 modified LCO particles. The coated LCO cathodes demonstrate enhanced capacity and impressive retention, and the main reason for the degradation of high voltage cells is found to be the instability of the anode side rather than the failure of the coated cathodes.