Electrolytes for Dual‐Carbon Batteries

Jiang, Xiaoyu; Luo, Laibing; Zhong, Faping; Feng, Xiangming; Chen, Weihua; Ai, Xinping; Yang, Hanxi; Cao, Yuliang

doi:10.1002/celc.201900300

Cited by 62 publications

(59 citation statements)

References 165 publications

(346 reference statements)

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“…The working principle of dual‐ion batteries (DIBs) is based on the reversible acceptance/release of cations and anions into/out the anode and cathode, respectively. [ 136,139–141 ] High operating voltage is a noteworthy feature of DIBs, which is also urgently required for aqueous zinc batteries. To obtain high energy density batteries, the integration of large‐capacity AZBs and high‐voltage DIBs into one device will be a promising strategy.…”

Section: Applications In Other Advanced Batteriesmentioning

confidence: 99%

Covalent–Organic Frameworks: Advanced Organic Electrode Materials for Rechargeable Batteries

Sun

Xie

Guo

et al. 2020

Advanced Energy Materials

462

322

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energy-storage systems with high specific energy, long lifespan, and excellent safety. [5][6][7] Among them, the rechargeable secondary batteries have been demonstrated as the most promising candidate for electricity storage and utilization. [8][9][10][11] As one of the most popular batteries, lithium-ion batteries (LIBs) have found immense success in consumer electronics and electric vehicles, and are under the consideration for energy-storage power stations. [12][13][14] However, the commercial LIBs based on transition metal-based inorganic compounds have encountered a bottleneck. [15][16][17] The charge storage of inorganic electrode materials is governed by the oxidation-state variation of transition metal centers and achieved a charge balance with the insertion of counterions. [18] Restricted by crystal lattice and structure stability, the size and valence of counterions are required to match the crystal structures, which severely limit further improvement of energy density. [19][20][21] Clearly, these factors intrinsically weaken the versatility of inorganic materials. For instance, the similar electrode materials, which are successful in LIBs, are not suitable for other alkali ions batteries. [22][23][24] Additionally, from the viewpoint of economical and renewable factors of mineral resources, the existing LIBs based on transition metals (e.g., cobalt, nickel, and manganese) are difficult to meet the requirement of large-scale energy storage. [25] Nowadays, various demands have been raised up for the state-ofthe-art batteries, not only in the enhancement of cycle life, fast charging, and safety, but also in the focus of cost, lightweight, pollution-free, and environmental benign. [26,27] Under this background, researchers gradually shift their studies on novel batteries system and electrode materials. [28][29][30][31] Among them, explorations on the possibility of using organic compounds as potential alternatives of current inorganic electrode materials have never been stopped. [32,33,66] Organics have been demonstrated as promising electrode candidates due to their variety, sustainability, relatively low cost, and environmental friendliness. [34][35][36] The structural diversity implies that the richness of organic materials will provide abundant options and room in this field. The molecule engineering means that the electrochemical properties of organic electrodes can be rationally tuned with different functional groups, which exhibits a good designability of organic materials. These important features allow various designable synthetic routes and convenient functionalization. Although organic electrode materials are endowed with many advantages, their development and Covalent-organic frameworks (COFs), featuring structural diversity, framework tunability and functional versatility, have emerged as promising organic electrode materials for rechargeable batteries and garnered tremendous attention in recent years. The adjustable pore configuration, coupled with the functionalization of frameworks through ...

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Section: Applications In Other Advanced Batteriesmentioning

confidence: 99%

Covalent–Organic Frameworks: Advanced Organic Electrode Materials for Rechargeable Batteries

Sun

Xie

Guo

et al. 2020

Advanced Energy Materials

462

322

View full text Add to dashboard Cite

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“…[1][2][3][4][5][6] This great versatility makes this class of material interesting for a large variety of applica-tions, for instance, solvent/catalist for organic reactions, [7][8][9] gas absorber, 10-13 lubricants, 14 and electrolytes. [15][16][17][18][19][20] Regarding their ability as electrolyte, several class of ionic liquids have been investigated as promising materials for battery and/or electric double-layer capacitors (EDLC) or simply supercapacitors. [21][22][23][24][25][26][27][28][29][30][31] Among many class of ionic liquids investigated as electrolytes for supercapacitors, the ones formed with sulfonium cations have received great attention due to their high ionic conductivity, low viscosity and relative high electrochemical stability.…”

Section: Introductionmentioning

confidence: 99%

Ether-Functionalized Sulfonium Ionic Liquid and Its Binary Mixtures with Acetonitrile as Electrolyte for Electrochemical Double Layer Capacitors: A Molecular Dynamics Study

Sampaio

Siqueira

2020

J. Phys. Chem. B

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Ether-functionalized sulfonium ionic liquids have been investigated as promising electrolytes in electrochemical storage energy devices due to their wide electrochemical window, high ionic conductivity and low viscosity. In spite of that, the viscosity of neat ionic liquids is still high for supercapacitor applications. Here we have used atomistic molecular dynamics simulations to describe transport properties, structure and supercapacitor performance of (2-methoxy-ethyl)-ethyl-methylsulfonium bis(trifluoromethanesulfonyl)imide [S 12G1 ][NTf 2 ] and its mixtures with acetonitrile (ACN). The viscosity and ionic conductivity of neat ionic liquid are in quite good agreement with the experimental results in a wide range of temperature. The addition of ACN decreases viscosity and, consequently, increases ionic conductivity and diffusion coefficients. Typical alternated layers of ions close to the electrodes surfaces are observed in supercapacitor built with [S 12G1 ][NTf 2 ] when is applied high voltage, DY = 3.0 V. Sharp layers of solvent adsorbed on the surface of electrodes are observed in the mixtures containing ACN. The charge accumulated on the electrodes is barely affected by the amount of ACN, which imply in similar performance in terms of ca-pacitance. However, the charging times follow the viscosities of the electrolytes, that is, the electrolytes with high content of ACN have higher power performance. At low voltage, the rearrangements of ions close to electrodes responsible to the charge accumulation is very low in neat [S 12G1 ][NTf 2 ]. The sharp layer of ACN makes this rearrangement easier, but it acts as a barrier to ion exchange at higher voltages, which increase the charging time. Charging of the supercapacitors is dependent of ion exchange and counter-ion adsorption at DY = 3.0 V.

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“…Upon the addition of TMP, this peak shifts to 3.9 Å with much decreased intensity. Since the decomposition of carbonate electrolytes at high potentials are caused by the low barrier H‐abstraction from carbonate and F‐abstraction from anion, [12b, 13a] the elongated distance of the H(EMC)‐F(TFSI − ) pair in the presence of TMP, indicates the disappearance of the EMC‐TFSI − complexes and rationalizes the enhanced oxidation stability. Moreover, prominent peaks of the Zn‐O(TMP) and Zn‐O(TFSI − ) at 2.75 Å can be observed (Figure 5 d) in the Zn(TFSI) 2 /EMC‐TMP electrolyte.…”

Section: Resultsmentioning

confidence: 99%

Anion Solvation Reconfiguration Enables High‐Voltage Carbonate Electrolytes for Stable Zn/Graphite Cells

Chen

Tang²,

et al. 2020

Angewandte Chemie

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Conventional carbonate solvents with lowH OMO levels are theoretically compatible with the low-cost, highvoltage chemistry of Zn/graphite batteries.H owever,t he nucleophilic attacko ft he anion on carbonates induces an oxidative breakdown at high potentials.H ere,w er estore the inherent anodic stability of carbonate electrolytes by designing amicro-heterogeneous anion solvation network. Based on the addition of as trongly electron-donating solvent, trimethyl phosphate (TMP), the oxidation-vulnerable anion-carbonate affinities are decoupled because of the preferential sequestration of anions into solvating TMP domains around the metal cations.The hybridized electrolytes elevate the electrochemical window of carbonate electrolytes by 0.45 Va nd enable the operation of Zn/graphite dual-ion cells at 2.80 Vw ith al ong cycle life (92 %c apacity retention after 1000 cycles). By inheriting the non-flammability from TMP and the high iontransport kinetics from the carbonate systems,t his facile strategy provides cells with the additional benefits of fire retardancy and high-power capability.

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Electrolytes for Dual‐Carbon Batteries

Cited by 62 publications

References 165 publications

Covalent–Organic Frameworks: Advanced Organic Electrode Materials for Rechargeable Batteries

Covalent–Organic Frameworks: Advanced Organic Electrode Materials for Rechargeable Batteries

Ether-Functionalized Sulfonium Ionic Liquid and Its Binary Mixtures with Acetonitrile as Electrolyte for Electrochemical Double Layer Capacitors: A Molecular Dynamics Study

Anion Solvation Reconfiguration Enables High‐Voltage Carbonate Electrolytes for Stable Zn/Graphite Cells

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