Article
Chemistry, Physical
Sen Zhou, Guoqiang Liu, Lei Wen, Hongze Luo
Summary: The lithium-rich materials with uniform spherical shape were successfully prepared via a hydrothermal method combined with calcination process. The content of Li2MnO3 can be tuned by adjusting the content of Li, which affects their electrochemical performances. The materials exhibit relatively good electrochemical performance when the stoichiometry of Li is 1.05.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Cheng-Hung Lin, Zhengyu Ju, Xiaoyin Zheng, Xiao Zhang, Nicole Zmich, Xiaoyang Liu, Kenneth J. Takeuchi, Amy C. Marschilok, Esther S. Takeuchi, Mingyuan Ge, Guihua Yu, Yu-chen Karen Chen-Wiegart
Summary: Modifying electrode materials and conductive fillers can enhance the performance and stability of electrodes. Three-dimensional quantification analysis of electrodes can provide a better understanding of the dimensionality effects of electrode materials.
Article
Chemistry, Physical
Leyuan Li, Yanchen Liu, Haobin Yu, Ruiting Sun, Zhiyu Ding, Kaikai Li, Qunhui Yuan, Junwei Wu, Xingjun Liu
Summary: The study successfully prepared hollow spherical lithium-rich cathode material using a mixed molten salt method, resulting in higher crystallinity and more Li+ diffusion channels, showing excellent electrochemical performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Yu Zou, Yueyun Zhou
Summary: The structure and electrochemical performance of layered xLi(2)MnO(3)·(1-x)(LiMn1/3Co1/3Ni1/3)O-2 cathode materials in Li-ion batteries were studied under different preparation conditions. Material prepared at 800°C for 20 hours showed higher crystallization degree and better electrochemical performance.
Article
Chemistry, Applied
Xiaoqian Xu, Yizhen Huang, Dan Li, Qichang Pan, Sijiang Hu, Yahao Li, Hongqiang Wang, Youguo Huang, Fenghua Zheng, Qingyu Li
Summary: The MgFe2O4 coating and Mg, Fe co-doping were applied to suppress lattice oxygen evolution and P2-O2 phase transformation of P2-Na2/3Ni1/3Mn2/3O2 at deep charging, resulting in enhanced high-voltage cycling performance of Na-ion batteries.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Physical
Haipeng Shan, Zhiming Zhang, Hui Cao, Binfeng Fan, Guangya Hou, Huazhen Cao, Yiping Tang, Guoqu Zheng
Summary: The degradation mechanism of LiNi1/3Co1/3Mn1/3O2 batteries is similar at different temperatures, with loss of active materials increasing with temperature. The evolution of the covering layer on the negative electrode surface is crucial for cycle life.
SURFACES AND INTERFACES
(2021)
Article
Electrochemistry
Noriko Kasai, Ryota Fujishima, Naoya Ishida, Naoto Kitamura, Yasushi Idemoto
Summary: The study showed that prelithiation of the graphite anode enabled stable charge and discharge of the cathode, while the use of different separators resulted in increased differences in electron density distribution and distortion of M-O-6 octahedra.
Article
Engineering, Environmental
Yanhui Sun, Ming Li, Boyu Pan, Jiaxin Li, Mohammad Hassan Hadizadeh, Fei Xu, Qingzhu Zhang, Wenxing Wang
Summary: This study investigates the transformation mechanisms, kinetics, and potential ecological risks of Ketamine (KET) degradation initiated by •OH/SO4•. The calculated results show that the H15 atom is more likely to be extracted, generating the most active dehydrogenated radical intermediate. The degradation products exhibit decreasing toxicity, but some remain at toxic levels. Additionally, the developmental toxicity, mutagenicity, and carcinogenicity of multiple transformation products increase compared with parent KET. This work contributes to understanding KET mineralization in liquid ecosystems and has implications for prospective industrial applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Hai Long, Clara Larson, Frank Coms, Bryan Pivovar, Gregg Dahlke, Michael Yandrasits
Summary: It has been found that membrane durability is a major obstacle in the application of proton-exchange membrane fuel cells (PEMFCs). Previous research suggests that membrane degradation is caused by reactions with generated radicals. However, recent findings indicate that the attack of tertiary fluorine may be the dominant degradation pathway, contradicting the theoretical predictions. This study proposes the presence of hydronium radicals in PEMFCs and demonstrates its stabilizing effect on the degradation reaction with tertiary fluorine, providing both experimental and theoretical support.
ACS PHYSICAL CHEMISTRY AU
(2022)
