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Draft:Kang Xu

From Wikipedia, the free encyclopedia

Kang Xu
EducationSouthwest University
Lanzhou Institute of Chemical Physics
Arizona State University
Known forBattery electrolytes and interphases
Scientific career
FieldsElectrochemistry, battery materials
WorkplacesUnited States Army Research Laboratory
SES AI
Ohio State University
C. Austen Angell

Kang Xu is a chemist working on liquid electrolytes and electrode-electrolyte interphases in rechargeable batteries. He was a research chemist at the United States Army Research Laboratory from 1997 to 2023.[1] In 2004 and 2014 he published Chemical Reviews surveys of lithium-ion electrolytes and interphases.[2][3] With Liumin Suo, Chunsheng Wang, and co-workers, he reported in 2015 a concentrated aqueous electrolyte, called "water-in-salt," that widened the voltage window of water-based lithium cells.[4]

Education and career

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Xu earned a B.Sc. in chemistry from Southwest University in 1985 and an M.Sc. in polymer science from the Lanzhou Institute of Chemical Physics of the Chinese Academy of Sciences in 1988. He received a Ph.D. in chemistry from Arizona State University in 1996; his adviser was C. Austen Angell.[1]

In 2017 the Army identified him as an ARL fellow and lead of its Aqueous Electrochemistry team.[5] He joined SES AI in 2023 and is its chief technology officer.[6] In 2026 he joined the mechanical and aerospace engineering faculty at Ohio State University as Ohio Eminent Scholar and Howard D. Winbigler Chair.[7]

Research

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Xu's work has concerned the liquids used in lithium-ion cells and the films that form where those liquids meet the electrodes. In a 2004 Chemical Reviews article he surveyed the organic solvents, lithium salts, and additives used in commercial cells, and the reactions of those liquids at the electrodes.[2] A 2014 article in the same journal is about the solid electrolyte interphase, the film that forms on graphite and lets the anode operate beyond the stability limit of the electrolyte.[3]

With Liumin Suo, Chunsheng Wang, and co-workers, he reported in 2015 a lithium bis(trifluoromethanesulfonyl)imide solution in which salt outnumbered water. The paper reported a window of about 3 V and a 2.3 V cell cycled about 1,000 times.[4] Chemical & Engineering News described the liquid as water dissolved in salt, rather than salt dissolved in water, and noted a protective film on the anode. It credited a team led by Suo and Wang at the University of Maryland, College Park, and by Xu at the Army laboratory.[8] In an accompanying Science perspective, Leland Smith and Bruce Dunn wrote that the concentrated electrolyte opened an operating window of 3 V.[9] Chen, Feng, and Qiao later wrote that the paper ushered in research on water-in-salt electrolytes; Martins and Torresi treated it as the demonstration that concentrated aqueous electrolytes could open a window near 3 V.[10][11] The University of Maryland's 2015 Invention of the Year in the physical sciences went to the related patent. Wang and Suo were the named recipients; a footnote lists Xu and two Army colleagues as co-recipients.[12]

The Royal Society of Chemistry published his book Electrolytes, Interfaces and Interphases: Fundamentals and Applications in Batteries in 2023.[13]

Awards

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  • 2017 - International Battery Association Technology Award[14]
  • 2018 - Electrochemical Society Battery Division Research Award[15]
  • 2020 - Fellow of the Electrochemical Society[16]
  • 2023 - Fellow of the Materials Research Society[17]

Selected publications

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  • Xu, Kang (2004). "Nonaqueous liquid electrolytes for lithium-based rechargeable batteries". Chemical Reviews. 104 (10): 4303–4418. doi:10.1021/cr030203g. PMID 15669157.
  • Xu, Kang (2014). "Electrolytes and interphases in Li-ion batteries and beyond". Chemical Reviews. 114 (23): 11503–11618. doi:10.1021/cr500003w. PMID 25351820.
  • Suo, Liumin; Borodin, Oleg; Gao, Tao; Olguin, Marco; Ho, Janet; Fan, Xiulin; Luo, Chao; Wang, Chunsheng; Xu, Kang (2015). ""Water-in-salt" electrolyte enables high-voltage aqueous lithium-ion chemistries". Science. 350 (6263): 938–943. doi:10.1126/science.aab1595. PMID 26586759.
  • Winter, Martin; Barnett, Brian; Xu, Kang (2018). "Before Li ion batteries". Chemical Reviews. 118 (23): 11433–11456. doi:10.1021/acs.chemrev.8b00422. PMID 30507176.
  • Xu, Kang (2023). Electrolytes, Interfaces and Interphases: Fundamentals and Applications in Batteries. Royal Society of Chemistry. doi:10.1039/9781837671311. ISBN 978-1-83916-310-4.

References

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  1. 1 2 "Xu, Kang". Ohio State University College of Engineering. Retrieved October 4, 2026.
  2. 1 2 Xu, Kang (2004). "Nonaqueous liquid electrolytes for lithium-based rechargeable batteries". Chemical Reviews. 104 (10): 4303–4418. doi:10.1021/cr030203g. PMID 15669157.
  3. 1 2 Xu, Kang (2014). "Electrolytes and interphases in Li-ion batteries and beyond". Chemical Reviews. 114 (23): 11503–11618. doi:10.1021/cr500003w. PMID 25351820.
  4. 1 2 Suo, Liumin; Borodin, Oleg; Gao, Tao; Olguin, Marco; Ho, Janet; Fan, Xiulin; Luo, Chao; Wang, Chunsheng; Xu, Kang (2015). ""Water-in-salt" electrolyte enables high-voltage aqueous lithium-ion chemistries". Science. 350 (6263): 938–943. doi:10.1126/science.aab1595. PMID 26586759.
  5. ↑ Dean, Tracie (May 31, 2017). "Army showcases latest technologies at 2017 DOD Lab Day". United States Army. Retrieved October 4, 2026.
  6. ↑ "SES AI Promotes Battery Veteran Dr. Kang Xu to CTO to Lead its AI Efforts; Announces First AI Commercial Agreement" (Press release). SES AI Corporation. October 17, 2024. Retrieved October 4, 2026 – via Business Wire.
  7. ↑ "Game Changer Scholars initiative attracts global leader in battery innovation". College of Engineering. Ohio State University. May 20, 2026. Retrieved October 4, 2026.
  8. ↑ "Supersalty water boosts battery safety". Chemical & Engineering News. Vol. 93, no. 46. November 23, 2015. Retrieved October 4, 2026.
  9. ↑ Smith, Leland; Dunn, Bruce (2015). "Opening the window for aqueous electrolytes". Science. 350 (6263): 918. doi:10.1126/science.aad5575. PMID 26586752.
  10. ↑ Chen, Ming; Feng, Guang; Qiao, Rui (2020). "Water-in-salt electrolytes: An interfacial perspective". Current Opinion in Colloid & Interface Science. 47: 99–110. doi:10.1016/j.cocis.2019.12.001.
  11. ↑ Martins, Vitor L.; Torresi, Roberto M. (2020). "Water-in-salt electrolytes for high voltage aqueous electrochemical energy storage devices". Current Opinion in Electrochemistry. 21: 62–68. doi:10.1016/j.coelec.2020.01.002.
  12. ↑ "Invention of the Year Award". A. James Clark School of Engineering, University of Maryland. Retrieved October 4, 2026.
  13. ↑ Xu, Kang (2023). Electrolytes, Interfaces and Interphases: Fundamentals and Applications in Batteries. Royal Society of Chemistry. doi:10.1039/9781837671311. ISBN 978-1-83916-310-4.
  14. ↑ "Awards". International Battery Association. Retrieved October 4, 2026.
  15. ↑ "Division/Section Awards". The Electrochemical Society. 2018. Retrieved October 4, 2026.
  16. ↑ "Fellow of The Electrochemical Society". The Electrochemical Society. Retrieved October 4, 2026.
  17. ↑ "2023 MRS Fellows". Materials Research Society. Retrieved October 4, 2026.
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