Strategic Design of Highly Concentrated Electrolyte Solutions for Mg                         2+                         /Li                         +                          Dual-Salt Hybrid Batteries

Jae Hyun Cho; Su Jin Kim; Jinwoo Oh; Jung Hoon Ha; Kwang Bum Kim; Kwan Young Lee; Jae Kyun Lee

doi:10.1021/acs.jpcc.8b09080

Strategic Design of Highly Concentrated Electrolyte Solutions for Mg ²⁺ /Li ⁺ Dual-Salt Hybrid Batteries

Jae Hyun Cho, Su Jin Kim, Jinwoo Oh, Jung Hoon Ha, Kwang Bum Kim, Kwan Young Lee, Jae Kyun Lee

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The available capacity of Mg hybrid batteries is closely related to the number of charge carriers within electrolyte solutions. Therefore, in this study, a dual-salt composition capable of supplying high Li ⁺ concentration was prepared. A dual-salt electrolyte consisting of a LiAlCl ₄ complex (LACC) and LiN(SO ₂ CF ₃ ) ₂ (LiTFSI) was found to be an excellent candidate, providing 2.2 M Li ⁺ concentration along with anodic stability up to 3 V (vs Mg/Mg ²⁺ ). However, the LACC moiety of the above composition first had to undergo a two-step modification procedure comprising "Mg powder treatment" and "conditioning process" to properly implement Mg deposition and stripping at the Mg anode. Spontaneous substitutions of oxidation states between the anionic Al ³⁺ complex and metallic Mg induced by these processes resulted in the generation of Mg ²⁺ complex species within the LACC solutions. The modified LACC was compatible even with 2 M of LiTFSI, the concentration with which we achieved 150 mA h g ^-1 capacity of a FePO ₄ cathode at 1.5 mg cm ^-2 loading density, when using an electrolyte volume of only 25.5 μL cm ^-2 .

Original language	English
Pages (from-to)	27866-27874
Number of pages	9
Journal	Journal of Physical Chemistry C
Volume	122
Issue number	49
DOIs	https://doi.org/10.1021/acs.jpcc.8b09080
Publication status	Published - 2018 Dec 13

Bibliographical note

Funding Information:
This work was supported by the institutional program of the Korea Institute of Science and Technology (project no. 2E27870 and 2E28142) and by a grant from the National Research Foundation of Korea (NRF-2011-C1AAA001-0030538).

Publisher Copyright:
© 2018 American Chemical Society.

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

Access to Document

10.1021/acs.jpcc.8b09080

Cite this

Cho, J. H., Kim, S. J., Oh, J., Ha, J. H., Kim, K. B., Lee, K. Y., & Lee, J. K. (2018). Strategic Design of Highly Concentrated Electrolyte Solutions for Mg ²⁺ /Li ⁺ Dual-Salt Hybrid Batteries Journal of Physical Chemistry C, 122(49), 27866-27874. https://doi.org/10.1021/acs.jpcc.8b09080

Strategic Design of Highly Concentrated Electrolyte Solutions for Mg ²⁺ /Li ⁺ Dual-Salt Hybrid Batteries . / Cho, Jae Hyun; Kim, Su Jin; Oh, Jinwoo et al.
In: Journal of Physical Chemistry C, Vol. 122, No. 49, 13.12.2018, p. 27866-27874.

Research output: Contribution to journal › Article › peer-review

Cho, JH, Kim, SJ, Oh, J, Ha, JH, Kim, KB, Lee, KY & Lee, JK 2018, ' Strategic Design of Highly Concentrated Electrolyte Solutions for Mg ²⁺ /Li ⁺ Dual-Salt Hybrid Batteries ', Journal of Physical Chemistry C, vol. 122, no. 49, pp. 27866-27874. https://doi.org/10.1021/acs.jpcc.8b09080

Cho JH, Kim SJ, Oh J, Ha JH, Kim KB, Lee KY et al. Strategic Design of Highly Concentrated Electrolyte Solutions for Mg ²⁺ /Li ⁺ Dual-Salt Hybrid Batteries Journal of Physical Chemistry C. 2018 Dec 13;122(49):27866-27874. doi: 10.1021/acs.jpcc.8b09080

Cho, Jae Hyun ; Kim, Su Jin ; Oh, Jinwoo et al. / Strategic Design of Highly Concentrated Electrolyte Solutions for Mg ²⁺ /Li ⁺ Dual-Salt Hybrid Batteries In: Journal of Physical Chemistry C. 2018 ; Vol. 122, No. 49. pp. 27866-27874.

@article{9472f0b31d2e4805ae3753fb8c7eb6df,

title = " Strategic Design of Highly Concentrated Electrolyte Solutions for Mg 2+ /Li + Dual-Salt Hybrid Batteries ",

abstract = " The available capacity of Mg hybrid batteries is closely related to the number of charge carriers within electrolyte solutions. Therefore, in this study, a dual-salt composition capable of supplying high Li + concentration was prepared. A dual-salt electrolyte consisting of a LiAlCl 4 complex (LACC) and LiN(SO 2 CF 3 ) 2 (LiTFSI) was found to be an excellent candidate, providing 2.2 M Li + concentration along with anodic stability up to 3 V (vs Mg/Mg 2+ ). However, the LACC moiety of the above composition first had to undergo a two-step modification procedure comprising {"}Mg powder treatment{"} and {"}conditioning process{"} to properly implement Mg deposition and stripping at the Mg anode. Spontaneous substitutions of oxidation states between the anionic Al 3+ complex and metallic Mg induced by these processes resulted in the generation of Mg 2+ complex species within the LACC solutions. The modified LACC was compatible even with 2 M of LiTFSI, the concentration with which we achieved 150 mA h g -1 capacity of a FePO 4 cathode at 1.5 mg cm -2 loading density, when using an electrolyte volume of only 25.5 μL cm -2 .",

author = "Cho, {Jae Hyun} and Kim, {Su Jin} and Jinwoo Oh and Ha, {Jung Hoon} and Kim, {Kwang Bum} and Lee, {Kwan Young} and Lee, {Jae Kyun}",

note = "Funding Information: This work was supported by the institutional program of the Korea Institute of Science and Technology (project no. 2E27870 and 2E28142) and by a grant from the National Research Foundation of Korea (NRF-2011-C1AAA001-0030538). Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

year = "2018",

month = dec,

day = "13",

doi = "10.1021/acs.jpcc.8b09080",

language = "English",

volume = "122",

pages = "27866--27874",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "49",

}

TY - JOUR

T1 - Strategic Design of Highly Concentrated Electrolyte Solutions for Mg 2+ /Li + Dual-Salt Hybrid Batteries

AU - Cho, Jae Hyun

AU - Kim, Su Jin

AU - Oh, Jinwoo

AU - Ha, Jung Hoon

AU - Kim, Kwang Bum

AU - Lee, Kwan Young

AU - Lee, Jae Kyun

N1 - Funding Information: This work was supported by the institutional program of the Korea Institute of Science and Technology (project no. 2E27870 and 2E28142) and by a grant from the National Research Foundation of Korea (NRF-2011-C1AAA001-0030538). Publisher Copyright: © 2018 American Chemical Society.

PY - 2018/12/13

Y1 - 2018/12/13

N2 - The available capacity of Mg hybrid batteries is closely related to the number of charge carriers within electrolyte solutions. Therefore, in this study, a dual-salt composition capable of supplying high Li + concentration was prepared. A dual-salt electrolyte consisting of a LiAlCl 4 complex (LACC) and LiN(SO 2 CF 3 ) 2 (LiTFSI) was found to be an excellent candidate, providing 2.2 M Li + concentration along with anodic stability up to 3 V (vs Mg/Mg 2+ ). However, the LACC moiety of the above composition first had to undergo a two-step modification procedure comprising "Mg powder treatment" and "conditioning process" to properly implement Mg deposition and stripping at the Mg anode. Spontaneous substitutions of oxidation states between the anionic Al 3+ complex and metallic Mg induced by these processes resulted in the generation of Mg 2+ complex species within the LACC solutions. The modified LACC was compatible even with 2 M of LiTFSI, the concentration with which we achieved 150 mA h g -1 capacity of a FePO 4 cathode at 1.5 mg cm -2 loading density, when using an electrolyte volume of only 25.5 μL cm -2 .

AB - The available capacity of Mg hybrid batteries is closely related to the number of charge carriers within electrolyte solutions. Therefore, in this study, a dual-salt composition capable of supplying high Li + concentration was prepared. A dual-salt electrolyte consisting of a LiAlCl 4 complex (LACC) and LiN(SO 2 CF 3 ) 2 (LiTFSI) was found to be an excellent candidate, providing 2.2 M Li + concentration along with anodic stability up to 3 V (vs Mg/Mg 2+ ). However, the LACC moiety of the above composition first had to undergo a two-step modification procedure comprising "Mg powder treatment" and "conditioning process" to properly implement Mg deposition and stripping at the Mg anode. Spontaneous substitutions of oxidation states between the anionic Al 3+ complex and metallic Mg induced by these processes resulted in the generation of Mg 2+ complex species within the LACC solutions. The modified LACC was compatible even with 2 M of LiTFSI, the concentration with which we achieved 150 mA h g -1 capacity of a FePO 4 cathode at 1.5 mg cm -2 loading density, when using an electrolyte volume of only 25.5 μL cm -2 .

UR - http://www.scopus.com/inward/record.url?scp=85058654066&partnerID=8YFLogxK

U2 - 10.1021/acs.jpcc.8b09080

DO - 10.1021/acs.jpcc.8b09080

M3 - Article

AN - SCOPUS:85058654066

SN - 1932-7447

VL - 122

SP - 27866

EP - 27874

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 49

ER -