Article
Chemistry, Physical
Mingzhu Liu, Jenel Vatamanu, Xinli Chen, Lidan Xing, Kang Xu, Weishan Li
Summary: By combining theoretical and experimental approaches, this study identified the direct reaction between water and PF6- as the main source of corrosive HF in Li-ion batteries. This hydrolysis process is accelerated by high voltage, highlighting the need for effective mitigation strategies to stabilize LiPF6-based electrolytes for high voltage LIBs. Clarifying this important electrolyte failure mechanism points to the potential for improved battery performance and longevity.
ACS ENERGY LETTERS
(2021)
Article
Multidisciplinary Sciences
Bryan H. R. Suryanto, Karolina Matuszek, Jaecheol Choi, Rebecca Y. Hodgetts, Hoang-Long Du, Jacinta M. Bakker, Colin S. M. Kang, Pavel Cherepanov, Alexandr N. Simonov, Douglas R. MacFarlane
Summary: Ammonia (NH3) is a globally important commodity for fertilizer production, but its synthesis by the Haber-Bosch process causes substantial emissions of carbon dioxide. Alternative methods being explored include the promising electrochemical lithium-mediated nitrogen reduction reaction, which has required sacrificial sources of protons. In this study, a phosphonium salt is introduced as a proton shuttle to help resolve this limitation, resulting in high NH3 production rates and demonstrated continuous operation for more than 3 days.
Article
Physics, Applied
Jie Liu, Lifang Zhang, Yufeng Cao, Zhenkang Wang, Xinyao Xia, Jinqiu Zhou, Xiaowei Shen, Xi Zhou, Tao Qian, Chenglin Yan
Summary: A water-tolerant solid polymer electrolyte (WT-SPE) with high Li+ conductivity and electrochemical stability has been developed, allowing for facile battery manufacturing in humid air without the need for a glovebox. The battery cells manufactured in air exhibit excellent capacity retention and promising potential for low-cost and facile fabrication of batteries in ambient atmosphere.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Ye Qu, Yanglin Chen, Jianmin Sun
Summary: This study developed a simple method to prepare sustainable amino acid ionic liquids (AAILs) and achieved efficient CO2 utilization under room temperature and atmospheric pressure. The newly developed AAILs were able to catalyze the reaction between CO2 and propylene oxide without the need for additional solvent and cocatalyst, showing high yield and selectivity.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Yingqiang Wu, Jiao Zhang, Jinli Liu, Li Sheng, Bo Zhang, Limin Wang, Siqi Shi, Li Wang, Hong Xu, Xiangming He
Summary: The article discusses the interactions between different structures of graphite anodes and electrolytes. The results show that the interaction between the electrolyte and graphite anode is influenced by the content of rhombohedral phase in the graphite.
Article
Materials Science, Multidisciplinary
Hongfei Wu, Xiaolin Pan, Haiyan Yu, Shiwen Bi
Summary: Carbonate is the main anionic impurity in alumina produced by the Bayer process, affecting the phase composition, morphology, and precipitation activity of desilication products (DSPs). Its presence influences the composition and crystallinity of DSPs, increasing the precipitation of cancrinite while altering the morphology of DSPs. Furthermore, an increase in carbonate concentration leads to higher amorphous phase content and precipitation activity in DSPs.
Article
Physics, Applied
Shou-Zhe Li, Shi-Hui Xie, Yu-Long Niu, Zilu Zhao, Dezheng Yang, Jialiang Zhang, Wenchun Wang, Xuechen Li
Summary: In this study, H2S is decomposed using a N-2 microwave plasma torch, resulting in the production of hydrogen and elemental sulfur. The conversion rate of H2S into H-2 is investigated by varying the dilution ratios of H2S to N-2, MW power, total flow rate, and arrangement of cooling rods in the reaction chamber. It is found that introducing a cooling rod downstream in the reaction chamber enhances the conversion rate, and an optimum point is determined for each conversion curve based on MW power, gas flow rate, and relative distance of the cooling rod.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
D. Santamaria-Perez, L. Pavic, R. Chulia-Jordan, J. Ruiz-Fuertes, C. Popescu, A. Otero-de-la-Roza
Summary: In this study, synchrotron X-ray powder diffraction experiments and density-functional theory calculations were used to investigate the phase transitions of silver carbonate under high pressure and high temperature. Two pressure-induced phase transitions were observed, and it was found that the intermediate phase transition was a result of non-hydrostatic conditions. The compound was found to be highly sensitive to non-hydrostatic conditions, and its compressibility and thermal expansion were determined to be relatively high.
SOLID STATE SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Min A. Lee, Han Jun Leem, Jisang Yu, Hyun-seung Kim
Summary: Introducing a lithium-chelating azamacrocyclic ligand into a carbonate-based electrolyte improves the reversible cycleability of lithium metal negative electrodes. The ligand facilitates reversible lithium plating and stripping on copper electrodes through its dual functionality, acting as a cationic shielding molecule for smooth lithium deposition and strengthening the interphasial characteristics of the lithium metal negative electrode with a Li3N-based solid electrolyte interphase film.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Physics, Applied
Li Wu, Xianyu Zhang, Tao Liu, Wencong Zhang, Junwu Tao, Fei Cheng
Summary: This Letter presents an atmospheric pressure low power microwave-induced air plasma source operating at 2.45 GHz. The device can self-ignite air and generate plasma with only 50 W microwave input power, without any additional trigger. Its sustaining power is as low as 10 W, and the gas temperature of plasma tail flame is about 32 degrees C measured by a fiber optic thermometer. Spectroscopic measurements revealed the presence of strong OH(A(2)S(+)? X-2?) bands at 306-310 nm and oxygen atomic lines O-I (3p5P? 3s5S) at 777.1 nm and O-I (3p3P?3s3S) at 844.6 nm. Furthermore, NO- ?(A(2)S(+)?X-2?(r)) from 200 to 300 nm was also detected in the air plasma jet. This portable plasma apparatus shows potential for air plasma applications in the biomedical fields.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Environmental
Weixia Lv, Caijian Zhu, Jun Chen, Caixia Ou, Qian Zhang, Shengwen Zhong
Summary: In this study, both the solvent and lithium salt were modified to enhance the low temperature performance of the electrolyte. The mixed additives of BA + EC + LBF were found to improve the capacity and voltage platform of the batteries at low temperatures by forming a thin LiF film on the cathode surface.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
BingYu Li, WenHua Yang, HaiLiang Chen, LiZhen Zhao, LingYan Chen, KaiPing Yang, WenCai Lu
Summary: The structures, stabilities, and superconducting properties of LiSeHn (n=4-10) hydrides under high pressure were investigated using the genetic algorithm (GA) and DFT calculation method. Three stable stoichiometries and four metastable stoichiometries were identified. Metal phase behavior was observed for C2 LiSeH4, Pmm2 LiSeH6, and C2 LiSeH10 above 150 GPa. Superconducting properties were predicted for C2 LiSeH4 and Pmm2 LiSeH6 with Tc values of 77 K at 200 GPa and 111 K at 250 GPa, respectively.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Boshan Sun, Jijun Xiong, Zhihong Fang, Lixia Gao, Aodi Xu, Pengyu Jia, Qiyun Feng, Chen Li
Summary: This study presents the design and testing method of an absolute pressure micro-pressure sensor that meets the requirements of high-temperature resistance, self-compensation, and micro-pressure measurement. The sensor's substrate is made of raw porcelain and has a high-temperature resistance due to the integration of a functional layer using silver paste via a screen-printing process. The hardware temperature self-compensation structure enables high-precision measurement, as demonstrated by experimental results showing accurate absolute pressure measurement within a wide temperature range.
IEEE SENSORS JOURNAL
(2023)
Article
Thermodynamics
Chan Gao, Junke Wang, Jun Wang, Rucheng Dai, Zhongping Wang, Zengming Zhang
Summary: This study investigates the thermal decomposition of 3, 3'-diamino-4, 4'-azoxyfurazan (DAAF) under high temperature and/or high pressure conditions using neon gas or liquid water. The results reveal the decomposition mechanism and product formation of DAAF under different conditions. High pressure and high temperature influence the initial decomposition process of DAAF and the intermolecular/intramolecular interactions, leading to different reaction pathways and product formations. These findings are significant for further exploration and application of DAAF.
COMBUSTION AND FLAME
(2022)
Article
Chemistry, Physical
Sirisak Singsen, Pussana Hirunsit, Suwit Suthirakun, Perla B. Balbuena
Summary: Room-temperature sodium-sulfur batteries are being developed as efficient energy storage solutions for electric vehicles and large-scale applications. However, they face challenges due to issues like polysulfide shuttling. This research focuses on studying the cluster formation of Na2S8 molecules, decomposition of ethylene carbonate and propylene carbonate, and the effect of fluoroethylene carbonate additive on the formation of solid electrolyte interphase on the Na anode. The findings offer insights into the interfacial phenomena between the Na-metal anode surface and electrolyte media.
JOURNAL OF CHEMICAL PHYSICS
(2023)
