水性リチウムイオン電池の代替塩としてのリチウム2トリフルオロメチル-4,5ディシアノイミダゾール (LiTDI)
Pauline Servajon1, Célia Doublet1, Arno Villalbi1
1Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LEPMI, Grenoble INP, Grenoble, France.
ChemSusChem
|September 2, 2025
まとめ
リチウムビス (トリフローロメタンスルフォニル) イミド (LiTFSI) は水性バッテリーには高価です. リチウムビス (トリフローロメタンスルフォニル) イミド (LiTFSI) は,低コストの代替品であり,濃度が低く,電化学的安定性ウィンドウで高いイオン伝導性を達成します.
科学分野:
- 電気化学
- 材料科学
- エネルギー貯蔵
背景:
- 塩水電池はリチウムイオン電池よりも安全で低コストです
- 現在の水性電池はしばしば高い塩分濃度 (例えば,LiTFSI) を必要とし,コストを増加させます.
- リチウムビス (トリフローロメタンスルフォニル) イミド (LiTFSI) は,これらのシステムで一般的な,しかし高価な塩です.
研究 の 目的:
- 水性バッテリーの費用対効果の高い代替塩としてリチウム二酸化トリフローロメタン硫ニルイミド (LiTDI) を調査する.
- LiTDIの性能,イオン伝導性,および水性電解質における電気化学的安定性を評価する.
主な方法:
- 水性バッテリー製剤におけるLiTDIの包括的な電気化学的調査.
- LiTFSIのような従来の塩と比較したLiTDI性能.
- イオン伝導性と電気化学的安定性窓 (ESW) の評価
主要な成果:
- LiTDIは,LiTFSIと比較してかなり低い塩分濃度で高いイオン伝導性を可能にします.
- LiTDIは,約2.5Vの安定した電気化学の窓を示しています.
- LiTDIの電気化学性能はLiTFSIより低いものの,その濃度が低いという要件はコスト効率を高めます.
結論:
- LiTDIは,水性高電圧電解質の開発に有望でより経済的な塩の選択肢を提供します.
- 低濃度で良好なイオン伝導性を達成する能力は,LITDIを実用的な水性バッテリー用途に適しています.
- LiTDIに関するさらなる研究は,より安価で安全な電気化学エネルギー貯蔵ソリューションにつながる可能性があります.
関連する概念動画
01:20Amides to Amines: LiAlH4 Reduction
5.1K
Amide reduction with strong reducing agents like lithium aluminum hydride proceeds through a nucleophilic acyl substitution to form amines. Primary, secondary, and tertiary amides yield primary, secondary, and tertiary amines, respectively.
Amide reduction requires two equivalents of the reducing agent, acting as a source of hydride ions. As shown in the figure, the reaction is initiated with a nucleophilic attack by the hydride ion at the carbonyl carbon to form a tetrahedral intermediate.
Amide reduction requires two equivalents of the reducing agent, acting as a source of hydride ions. As shown in the figure, the reaction is initiated with a nucleophilic attack by the hydride ion at the carbonyl carbon to form a tetrahedral intermediate.
5.1K
01:19Acid Halides to Alcohols: LiAlH4 Reduction
3.1K
Acid halides are reduced to alcohols in the presence of a strong reducing agent like lithium aluminum hydride.
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
3.1K
01:14Acid Halides to Ketones: Gilman Reagent
3.1K
Lithium dialkyl cuprate, also known as Gilman reagents, selectively reduces acid halides to ketones. The acid chloride is treated with Gilman reagent at −78 °C in the presence of ether solution to produce a ketone in good yield.
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
3.1K
02:48Ionic Bonding and Electron Transfer
42.2K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
42.2K
03:45Formation of Complex Ions
24.0K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
24.0K
02:42Ionic Crystal Structures
14.7K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.7K