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Chin. Phys. B, 2016, Vol. 25(1): 016101    DOI: 10.1088/1674-1056/25/1/016101
SPECIAL TOPIC—Fundamental physics research in lithium batteries Prev   Next  

FT-Raman spectroscopy study of solvent-in-salt electrolytes

Liumin Suo(索鎏敏), Zheng Fang(方铮), Yong-Sheng Hu(胡勇胜), Liquan Chen(陈立泉)
Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Abstract  Cation-anion interaction with different ratios of salt to solvent is investigated by FT-Raman spectroscopy. The fitting result of the C-N-C bending vibration manifests that the cation-anion coordination structure changes tremendously with the variation of salt concentration. It is well known that lithium-ion transport in ultrahigh salt concentration electrolyte is dramatically different from that in dilute electrolyte, due to high viscosity and strong cation-anion interaction. In ultrahigh salt concentrated “solvent-in-salt” electrolyte (SIS-7#), we found, on one hand, that the cation and anion in the solution mainly formed cation-anion pairs with a high Li+ coordination number ( ≥ 1), including intimate ion pairs (20.1%) and aggregated ion pairs (79.9%), which not only cause low total ionic conductivity but also cause a high lithium transference number (0.73). A possible lithium transport mechanism is proposed: in solvent-in-salt electrolytes, lithium ions' direct movement presumably depends on Li-ion exchange between aggregated ion pairs and solvent molecules, which repeats a dissolving and re-complexing process between different oxygen groups of solvent molecules.
Keywords:  FT-Raman spectroscopy      lithium-ion batteries      electrolyte      solvent-in-salt electrolytes     
Received:  26 May 2015      Published:  05 January 2016
PACS:  61.05.-a (Techniques for structure determination)  
  61.20.Gy (Theory and models of liquid structure)  
  61.20.Qg (Structure of associated liquids: electrolytes, molten salts, etc.)  
Fund: Project supported by the National Basic Research Program of China (Grant No. 2014CB932300), the National Natural Science Foundation of China (Grant Nos. 51222210, 51472268, and 11234013), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA09010300).
Corresponding Authors:  Liumin Suo     E-mail:

Cite this article: 

Liumin Suo(索鎏敏), Zheng Fang(方铮), Yong-Sheng Hu(胡勇胜), Liquan Chen(陈立泉) FT-Raman spectroscopy study of solvent-in-salt electrolytes 2016 Chin. Phys. B 25 016101

[1] Bruce P G, Freunberger S A, Hardwick L J and Tarascon J M 2012 Nat. Mater. 11 19
[2] Ellis B L, Lee K T and Nazar L F 2010 Chem. Mater. 22 691
[3] Goodenough J B and Kim Y 2010 Chem. Mater. 22 587
[4] Scrosati B and Garche J 2010 J. Power Sources. 195 2419
[5] Tarascon J M and Armand M 2001 Nature 414 359
[6] Suo L, Zhu Y, Han F, Gao T, Luo C, Fan X, Hu Y S and Wang C 2015 Nano Energy 13 467
[7] Ma, J, Fang, Z, Yan, Y, Yang, Z, Gu, L, Hu Y S, Li H, Wang Z and Huang X 2015 Adv. Energy Mater. 5 1500046
[8] Mu L Q, Hu Y S and Chen L Q 2015 Chine. Phys. B 24 038202
[9] Zhao L, Pan H L, Hu Y S, Li H and Chen L Q 2012 Chine. Phys. B. 21 028201
[10] Xu K 2004 Chem. Rev. 104 4303
[11] Suo L M, Hu Y S, Li H, Armand M and Chen L Q 2013 Nat. Commun. 4 1481
[12] Seo D M, Borodin O, Han S D, Boyle P D and Henderson W A 2012 J. Electrochem. Soc. 159 A1489
[13] Seo D M, Borodin O, Han S D, Ly Q, Boyle P D and Henderson W A 2012 J. Electrochem. Soc. 159 A553
[14] Umebayashi Y, Mitsugi T, Fukuda S, Fujimori T, Fujii K, Kanzaki R, Takeuchi M and Ishiguro S I 2007 J. Phys. Chem. B. 111 13028
[15] Victor P J, Das B and Hazra D K 2001 J. Phys. Chem. A 105 5960
[16] Muhuri P K, Das B and Hazra D K 1997 J. Phys. Chem. B 101 3329
[17] Goutev N, Ohno K and Matsuura H 2000 J. Phys. Chem. A 104 9226
[18] Mohacek-Grosev V, Furic K and Ivankovic H 2013 Vib. Spectrosc. 64 101
[19] Rey I, Johansson P, Lindgren J, Lassegues J C, Grondin J and Servant L 1998 J. Phys. Chem. A 102 3249
[20] Brouillette D, Irish D E, Taylor N J, Gerald Perron, Odziemkowski M and Desnoyers J E 2002 Phys. Chem. Chem. Phys. 4 6063
[21] Matsubara K, Kaneuchi R and Maekita N 1998 J. Chem. Soc. Faraday T. 94 3601
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