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Co‐Regulating Planar Mg Deposition and Bromine‐Rich Mg Anode‐Electrolyte Interface by Multifunctional Organic Bromine Additive.

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Title: Co‐Regulating Planar Mg Deposition and Bromine‐Rich Mg Anode‐Electrolyte Interface by Multifunctional Organic Bromine Additive.
Authors: Chinnadurai, Deviprasath1 (AUTHOR), Kumar, Sonal1 (AUTHOR), Zhang, Chang2 (AUTHOR), Ng, Man‐Fai3 (AUTHOR), Li, Yuanjian1 (AUTHOR), Wang, Jianbiao1 (AUTHOR), Ghosh, Tanmay1 (AUTHOR), Yang, Gaoliang1 (AUTHOR), Xing, Zhenxiang1 (AUTHOR), Liu, Wei2 (AUTHOR) liuwei1@shanghaitech.edu.cn, Seh, Zhi Wei1 (AUTHOR) sehzw@imre.a-star.edu.sg
Source: Advanced Energy Materials. 8/26/2025, Vol. 15 Issue 32, p1-13. 13p.
Subject Terms: *Storage batteries, *Energy storage, *Energy transfer, *Electrochemical electrodes, *Electrolyte analysis
Abstract: Rechargeable magnesium batteries (RMBs) are highly promising candidates for next‐generation energy storage systems due to their superior energy density and intrinsic safety. However, severe magnesium (Mg) anode passivation in conventional electrolytes and non‐uniform Mg deposition significantly compromise their reversibility and cycling stability. Here, for the first time, a multifunctional 1‐bromooctane (OctylBr) additive is introduced into the strongly passivating magnesium bis(hexamethyldisilazide) (Mg(HMDS)₂) electrolyte to engineer a Br‐enriched solid electrolyte interphase (SEI) and promote uniform planar Mg deposition. This strategic electrolyte modification extends the Mg cycling lifespan of conventional electrolytes from 0 to 3600 h with an exceptionally low overpotential of 45 mV in a symmetric cell and a high coulombic efficiency of 99.34% in an asymmetric cell. The planar deposition enabled by the electrolyte allows for reversible Mg plating/stripping across a broad range of areal capacities (0.5–25 mAh cm−2). Notably, at high areal capacity of 10 mAh cm−2, the electrolyte sustains a lifespan of 640 h in a symmetric cell, underscoring its effectiveness for high‐energy applications. Full‐cell evaluations with Mo6S8 cathodes further validate the enhanced cycling performance, and the approach proves effective across various conventional Mg salts. These findings position OctylBr as a generally compatible electrolyte additive, unlocking new pathways for high‐performance, long‐life RMBs. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 187571972
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Co‐Regulating Planar Mg Deposition and Bromine‐Rich Mg Anode‐Electrolyte Interface by Multifunctional Organic Bromine Additive.
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  Data: <searchLink fieldCode="AR" term="%22Chinnadurai%2C+Deviprasath%22">Chinnadurai, Deviprasath</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kumar%2C+Sonal%22">Kumar, Sonal</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Chang%22">Zhang, Chang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ng%2C+Man‐Fai%22">Ng, Man‐Fai</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Yuanjian%22">Li, Yuanjian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Jianbiao%22">Wang, Jianbiao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ghosh%2C+Tanmay%22">Ghosh, Tanmay</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Gaoliang%22">Yang, Gaoliang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xing%2C+Zhenxiang%22">Xing, Zhenxiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Wei%22">Liu, Wei</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> liuwei1@shanghaitech.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Seh%2C+Zhi+Wei%22">Seh, Zhi Wei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sehzw@imre.a-star.edu.sg</i>
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  Data: <searchLink fieldCode="JN" term="%22Advanced+Energy+Materials%22">Advanced Energy Materials</searchLink>. 8/26/2025, Vol. 15 Issue 32, p1-13. 13p.
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  Data: *<searchLink fieldCode="DE" term="%22Storage+batteries%22">Storage batteries</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+storage%22">Energy storage</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+transfer%22">Energy transfer</searchLink><br />*<searchLink fieldCode="DE" term="%22Electrochemical+electrodes%22">Electrochemical electrodes</searchLink><br />*<searchLink fieldCode="DE" term="%22Electrolyte+analysis%22">Electrolyte analysis</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Rechargeable magnesium batteries (RMBs) are highly promising candidates for next‐generation energy storage systems due to their superior energy density and intrinsic safety. However, severe magnesium (Mg) anode passivation in conventional electrolytes and non‐uniform Mg deposition significantly compromise their reversibility and cycling stability. Here, for the first time, a multifunctional 1‐bromooctane (OctylBr) additive is introduced into the strongly passivating magnesium bis(hexamethyldisilazide) (Mg(HMDS)₂) electrolyte to engineer a Br‐enriched solid electrolyte interphase (SEI) and promote uniform planar Mg deposition. This strategic electrolyte modification extends the Mg cycling lifespan of conventional electrolytes from 0 to 3600 h with an exceptionally low overpotential of 45 mV in a symmetric cell and a high coulombic efficiency of 99.34% in an asymmetric cell. The planar deposition enabled by the electrolyte allows for reversible Mg plating/stripping across a broad range of areal capacities (0.5–25 mAh cm−2). Notably, at high areal capacity of 10 mAh cm−2, the electrolyte sustains a lifespan of 640 h in a symmetric cell, underscoring its effectiveness for high‐energy applications. Full‐cell evaluations with Mo6S8 cathodes further validate the enhanced cycling performance, and the approach proves effective across various conventional Mg salts. These findings position OctylBr as a generally compatible electrolyte additive, unlocking new pathways for high‐performance, long‐life RMBs. [ABSTRACT FROM AUTHOR]
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      – Type: doi
        Value: 10.1002/aenm.202500979
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      – Code: eng
        Text: English
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        PageCount: 13
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      – SubjectFull: Storage batteries
        Type: general
      – SubjectFull: Energy storage
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      – SubjectFull: Energy transfer
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      – SubjectFull: Electrochemical electrodes
        Type: general
      – SubjectFull: Electrolyte analysis
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      – TitleFull: Co‐Regulating Planar Mg Deposition and Bromine‐Rich Mg Anode‐Electrolyte Interface by Multifunctional Organic Bromine Additive.
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            – D: 26
              M: 08
              Text: 8/26/2025
              Type: published
              Y: 2025
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