Search

Your search keyword '"Dai, Hongjie"' showing total 1,662 results
Start Over Author "Dai, Hongjie"
1,662 results on '"Dai, Hongjie"'

1. A human autoimmune organoid model reveals IL-7 function in coeliac disease

Author

Santos, António J. M., van Unen, Vincent, Lin, Zhongqi, Chirieleison, Steven M., Ha, Nhi, Batish, Arpit, Chan, Joshua E., Cedano, Jose, Zhang, Elisa T., Mu, Qinghui, Guh-Siesel, Alexander, Tomaske, Madeline, Colburg, Deana, Varma, Sushama, Choi, Shannon S., Christophersen, Asbjørn, Baghdasaryan, Ani, Yost, Kathryn E., Karlsson, Kasper, Ha, Andrew, Li, Jing, Dai, Hongjie, Sellers, Zachary M., Chang, Howard Y., Dunn, James C. Y., Zhang, Bing M., Mellins, Elizabeth D., Sollid, Ludvig M., Fernandez-Becker, Nielsen Q., Davis, Mark M., and Kuo, Calvin J.

Published
2024
Full Text
View/download PDF

4. Rechargeable Li/Cl$_2$ battery down to -80 {\deg}C

Author

Liang, Peng, Zhu, Guanzhou, Huang, Cheng-Liang, Li, Yuan-Yao, Sun, Hao, Yuan, Bin, Wu, Shu-Chi, Li, Jiachen, Wang, Feifei, Hwang, Bing-Joe, and Dai, Hongjie

Subjects
Physics - Applied Physics
Abstract

Low temperature rechargeable batteries are important to life in cold climates, polar/deep-sea expeditions and space explorations. Here, we report ~ 3.5 - 4 V rechargeable lithium/chlorine (Li/Cl2) batteries operating down to -80 {\deg}C, employing Li metal negative electrode, a novel CO2 activated porous carbon (KJCO2) as the positive electrode, and a high ionic conductivity (~ 5 to 20 mS cm-1 from -80 {\deg}C to 25 {\deg}C) electrolyte comprised of 1 M aluminum chloride (AlCl3), 0.95 M lithium chloride (LiCl), and 0.05 M lithium bis(fluorosulfonyl)imide (LiFSI) in low melting point (-104.5 {\deg}C) thionyl chloride (SOCl2). Between room-temperature and -80 {\deg}C, the Li/Cl2 battery delivered up to ~ 30,000 - 4,500 mAh g-1 first discharge capacity and a 1,200 - 5,000 mAh g-1 reversible capacity (discharge voltages in ~ 3.5 to 3.1 V) over up to 130 charge-discharge cycles. Mass spectrometry and X-ray photoelectron spectroscopy (XPS) probed Cl2 trapped in the porous carbon upon LiCl electro-oxidation during charging. At lower temperature down to -80 {\deg}C, SCl2/S2Cl2 and Cl2 generated by electro-oxidation in the charging step were trapped in porous KJCO2 carbon, allowing for reversible reduction to afford a high discharge voltage plateau near ~ 4 V with up to ~ 1000 mAh g-1 capacity for SCl2/S2Cl2 reduction and up to ~ 4000 mAh g-1 capacity at ~ 3.1 V plateau for Cl2 reduction. Towards practical use, we made CR2032 Li/Cl2 battery cells to drive digital watches at -40 {\deg}C and light emitting diode at -80 {\deg}C, opening Li/Cl2 secondary batteries for ultra-cold conditions.

Published
2023

7. Shedding Light on Rechargeable Na/Cl$_2$ Battery

Author

Zhu, Guanzhou, Liang, Peng, Huang, Cheng-Liang, Wu, Shu-Chi, Huang, Cheng-Chia, Li, Yuan-Yao, Jiang, Shi-Kai, Huang, Wei-Hsiang, Li, Jiachen, Wang, Feifei, Hwang, Bing-Joe, and Dai, Hongjie

Subjects
Physics - Applied Physics
Abstract

Advancing new ideas of rechargeable batteries represents an important path to meeting the ever increasing energy storage needs. Recently we showed rechargeable sodium/chlorine (Na/Cl$_2$) (or lithium/chlorine Li/Cl$_2$) batteries that used a Na (or Li) metal negative electrode, a microporous amorphous carbon nanosphere (aCNS) positive electrode and an electrolyte containing dissolved AlCl$_3$ and fluoride additives in thionyl chloride (SOCl$_2$). The main battery redox reaction involved conversion between NaCl and Cl$_2$ trapped in the carbon positive electrode, delivering a cyclable capacity of up to 1200 mAh g$^{-1}$ (based on positive electrode mass) at a ~ 3.5 V discharge voltage. Here, we discovered by X-ray photoelectron spectroscopy (XPS) that upon charging a Na/Cl$_2$ battery, chlorination of carbon in the positive electrode occurred to form C-Cl accompanied by molecular Cl$_2$ infiltrating the porous aCNS, consistent with Cl$_2$ probed by mass spectrometry. Synchrotron X-ray diffraction observed the development of graphitic ordering in the initially amorphous aCNS under battery charging when the carbon matrix was oxidized/chlorinated and infiltrated with Cl$_2$. The C-Cl, Cl$_2$ species and graphitic ordering were reversible upon discharge, accompanied by NaCl formation. The results revealed redox conversion between NaCl and Cl$_2$, reversible graphitic ordering/amorphourization of carbon through battery charge/discharge, and for the first time probed trapped Cl$_2$ in porous carbon by XPS., Comment: 30 pages, 9 figures

Published
2023

11. High-Capacity Rechargeable $Li/Cl_2$ Batteries with Graphite Positive Electrodes

Author

Zhu, Guanzhou, Liang, Peng, Huang, Cheng-Liang, Huang, Cheng-Chia, Li, Yuan-Yao, Wu, Shu-Chi, Li, Jiachen, Wang, Feifei, Tian, Xin, Huang, Wei-Hsiang, Jiang, Shi-Kai, Hung, Wei-Hsuan, Chen, Hui, Lin, Meng-Chang, Hwang, Bing-Joe, and Dai, Hongjie

Subjects
Physics - Applied Physics
Abstract

Developing new types of high-capacity and high-energy density rechargeable battery is important to future generations of consumer electronics, electric vehicles, and mass energy storage applications. Recently we reported ~ 3.5 V sodium/chlorine $(Na/Cl_2)$ and lithium/chlorine $(Li/Cl_2)$ batteries with up to 1200 mAh $g^{-1}$ reversible capacity, using either a Na or Li metal as the negative electrode, an amorphous carbon nanosphere (aCNS) as the positive electrode, and aluminum chloride $(AlCl_3)$ dissolved in thionyl chloride $(SOCl_2)$ with fluoride-based additives as the electrolyte. The high surface area and large pore volume of aCNS in the positive electrode facilitated NaCl or LiCl deposition and trapping of $Cl_2$ for reversible $NaCl/Cl_2$ or $LiCl/Cl_2$ redox reactions and battery discharge/charge cycling. Here we report an initially low surface area/porosity graphite (DGr) material as the positive electrode in a $Li/Cl_2$ battery, attaining high battery performance after activation in carbon dioxide $(CO_2)$ at 1000 {\deg}C (DGr_ac) with the first discharge capacity ~ 1910 mAh $g^{-1}$ and a cycling capacity up to 1200 mAh $g^{-1}$. Ex situ Raman spectroscopy and X-ray diffraction (XRD) revealed the evolution of graphite over battery cycling, including intercalation/de-intercalation and exfoliation that generated sufficient pores for hosting $LiCl/Cl_2$ redox. This work opens up widely available, low-cost graphitic materials for high-capacity alkali metal/$Cl_2$ batteries. Lastly, we employed mass spectrometry to probe the $Cl_2$ trapped in the graphitic positive electrode, shedding light into the $Li/Cl_2$ battery operation., Comment: 37 pages, 16 figures, 1 table

Published
2022

Catalog

Books, media, physical & digital resources
See catalog results