A flexible rechargeable aqueous zinc manganese-dioxide battery working at −20 °C

Mo, Funian; Liang, Guojin; Meng, Qiangqiang; Liu, Zhuoxin; Li, Hongfei; Fan, Jun; Chen, Zhi

doi:10.1039/c8ee02892c

Cited by 532 publications

(421 citation statements)

References 32 publications

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“…[47][48][49] However, by conventional battery assembly approach, only the outside layer of the active materials can contact solid-state electrolyte, leading to low cell-level volumetric and specific energy density. [47][48][49] However, by conventional battery assembly approach, only the outside layer of the active materials can contact solid-state electrolyte, leading to low cell-level volumetric and specific energy density.…”

Section: Solid-state Batteriesmentioning

confidence: 99%

Achieving High‐Voltage and High‐Capacity Aqueous Rechargeable Zinc Ion Battery by Incorporating Two‐Species Redox Reaction

Chen

Long

et al. 2019

Advanced Energy Materials

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361

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safety, and low cost. [1][2][3][4][5] However, the strong electrostatic interaction with host materials originating from divalent chemistry leads to low output voltage, poor reversibility, and especially sluggish kinetics. Various cathode materials have been developed to navigate these challenges. Currently, the most studied cathode active materials are manganesebased [6][7][8][9] and vanadium-based [10][11][12][13] composites. Nonetheless, relative low operating voltage and poor rate performance remains as issues. To reach the operating voltage of electronic devices, multiple batteries must be connected in series. This practice increases the volume of battery and causes energy loss. Furthermore, poor rate capability limits application of Zn-ion batteries in high-power appliances.The Prussian blue analogues (PBAs) possessing a 3D open framework with large interstitial sites, [4][5][6][7][8][9][10][11][12][13][14][15][16] are considered as a promising host material for reversible Zn-ion intercalation/deintercalation with fast charge/discharge properties and high operational voltage, which is ascribed to its ideal crystal structure and desirable electrochemical properties. [17] Recently, hexacyanometallates with a typical formula of A x M′[M″(CN) 6 ] y ⋅nH 2 O (simply denoted as M′/M″ PBA) are investigated as cathode active materials for aqueous batteries including Li-, Na-, Mg-, Ca-, and Zn-ion batteries, where the A Herein, a two-species redox reaction of Co(II)/Co(III) and Fe(II)/Fe(III) incorporated in cobalt hexacyanoferrate (CoFe(CN) 6 ) is proposed as a breakthrough to achieve jointly high-capacity and high-voltage aqueous Zn-ion battery. The Zn/CoFe(CN) 6 battery provides a highly operational voltage plateau of 1.75 V (vs metallic Zn) and a high capacity of 173.4 mAh g −1 at current density of 0.3 A g −1 , taking advantage of the two-species redox reaction of Co(II)/Co(III) and Fe(II)/Fe(III) couples.Even under extremely fast charge/discharge rate of 6 A g −1 , the battery delivers a sufficiently high discharge capacity of 109.5 mAh g −1 with its 3D opened structure framework. This is the highest capacity delivered among all the batteries using Prussian blue analogs (PBAs) cathode up to now. Furthermore, Zn/CoFe(CN) 6 battery achieves an excellent cycling performance of 2200 cycles without any capacity decay at coulombic efficiency of nearly 100%. One further step, a sol-gel transition strategy for hydrogel electrolyte is developed to construct high-performance flexible cable-type battery. With the strategy, the active materials can adequately contact with electrolyte, resulting in improved electrochemical performance (≈18.73% capacity increase) and mechanical robustness of the solid-state device. It is believed that this study optimizes electrodes by incorporating multi redox reaction species for high-voltage and high-capacity batteries.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.

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Section: Solid-state Batteriesmentioning

confidence: 99%

Achieving High‐Voltage and High‐Capacity Aqueous Rechargeable Zinc Ion Battery by Incorporating Two‐Species Redox Reaction

Chen

Long

et al. 2019

Advanced Energy Materials

Self Cite

361

292

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“…[14,15] The organogel components can efficiently inhibit the formation of ice crystals. [14,15] The organogel components can efficiently inhibit the formation of ice crystals.…”

Section: Introductionmentioning

confidence: 99%

Antifreezing Hydrogel with High Zinc Reversibility for Flexible and Durable Aqueous Batteries by Cooperative Hydrated Cations

Zhu

Wang

Hong-mei

et al. 2019

Adv Funct Materials

218

164

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Hydrogels are widely used in flexible aqueous batteries due to their liquid-like ion transportation abilities and solid-like mechanical properties. Their potential applications in flexible and wearable electronics introduce a fundamental challenge: how to lower the freezing point of hydrogels to preserve these merits without sacrificing hydrogels' basic advantages in low cost and high safety. Moreover, zinc as an ideal anode in aqueous batteries suffers from low reversibility because of the formation of insulative byproducts, which is mainly caused by hydrogen evolution via extensive hydration of zinc ions. This, in principle, requires the suppression of hydration, which induces an undesirable increase in the freezing point of hydrogels. Here, it is demonstrated that cooperatively hydrated cations, zinc and lithium ions in hydrogels, are very effective in addressing the above challenges. This simple but unique hydrogel not only enables a 98% capacity retention upon cooling down to −20 °C from room temperature but also allows a near 100% capacity retention with >99.5% Coulombic efficiency over 500 cycles at −20 °C. In addition, the strengthened mechanical properties of the hydrogel under subzero temperatures result in excellent durability under various harsh deformations after the freezing process.

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“…[4] This means the reported stretchable supercapacitor device will get longer and longer after acouple of stretching cycles,losing its stretchability rapidly. [13] Herein an Agar/hydrophobically associated polyacrylamide (HPAAm) double network (DN) hydrogel and pure polypyrrole (PPy) film based all-polymer supercapacitor is fabricated, which is highly elastic and reversibly stretchable. [6] Stretchable supercapacitors naturally need stretchable hydrogels,t ypically PA A( polyacrylic acid) and PA M( polyacrylamide) as quasi-solid-state electrolytes.…”

mentioning

confidence: 99%

“…[7] These hydrogels are usually crosslinked by hydrogen bonds,w hich is ak ind of weak interactions. [13] Herein an Agar/hydrophobically associated polyacrylamide (HPAAm) double network (DN) hydrogel and pure polypyrrole (PPy) film based all-polymer supercapacitor is fabricated, which is highly elastic and reversibly stretchable. [8] This results in astretchable but not elastic feature of hydrogels,which means after stretching process,large strain residue is not avoidable.…”

mentioning

confidence: 99%

“…Moreover,t he high-water content and salts incorporated in the hydrogels,w hich is needed to achieve high ionic conductivity,f urther loosen the chain network and ruin their mechanical robustness. [13] Herein an Agar/hydrophobically associated polyacrylamide (HPAAm) double network (DN) hydrogel and pure polypyrrole (PPy) film based all-polymer supercapacitor is fabricated, which is highly elastic and reversibly stretchable. [6b] Moreover,the electrode materials are usually carbon [9] or metal oxide based inorganic materials, [10] which are intrinsically non-stretchable.…”

mentioning

confidence: 99%

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A Highly Elastic and Reversibly Stretchable All‐Polymer Supercapacitor

et al. 2019

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Multiple stretchability has never been demonstrated as supercapacitors because the hydrogel used cannot fully recover after being heavily deformed. Now, ahighly reversibly stretchable all-polymer supercapacitor was fabricated using ad eveloped double network hydrogel (DN hydrogel) as electrolyte and pure polypyrrole (PPy) as electrode.T he DN hydrogel provides excellent mechanical properties,w hich can be stretched up to 500 %m any times and then restore almost 100 %ofthe original length. To fabricate the fully recoverable stretchable supercapacitor,w ea nnealed af ree-standing pure conducting polymer film as electrode so that the electrodes induced retardance is minimized. The as-fabricated DN hydrogel/pure conducting polymer supercapacitors can be perfectly recovered from 100 %strain with almost no residual deformation left and the electrochemical performance can be maintained even after 1000 stretches (but not bending).Inrecent years,m any flexible/stretchable supercapacitor devices have been demonstrated. [1] However,alongneglected issue is the elasticity of devices,t hat is,t he reversible stretchability of stretchable supercapacitors.F lexible supercapacitors can be bent many times,which has been widely demonstrated. [2] But for stretchable supercapacitors, researchers usually show that the device can be stretched but never mentioned how many times the device can be stretched. This is because the stretchable hydrogel electrolyte,w hich is an essential component of as tretchable supercapacitor, usually possesses very large strain residue after being stretched even once. [3] It gets worse for ad evice as the electrode materials are usually inorganic materials,which will further hinder geometry recovery of the whole device. [4] This means the reported stretchable supercapacitor device will get longer and longer after acouple of stretching cycles,losing its stretchability rapidly. [5] In detail, the difficulty to fabricate an elastic,r eversibly stretchable supercapacitor originates from the strain residue of most hydrogel electrolytes. [6] Stretchable supercapacitors naturally need stretchable hydrogels,t ypically PA A( polyacrylic acid) and PA M( polyacrylamide) as quasi-solid-state electrolytes. [7] These hydrogels are usually crosslinked by hydrogen bonds,w hich is ak ind of weak interactions. Moreover,t he high-water content and salts incorporated in the hydrogels,w hich is needed to achieve high ionic conductivity,f urther loosen the chain network and ruin their mechanical robustness. [8] This results in astretchable but not elastic feature of hydrogels,which means after stretching process,large strain residue is not avoidable. [6b] Moreover,the electrode materials are usually carbon [9] or metal oxide based inorganic materials, [10] which are intrinsically non-stretchable. Their stretchability is obtained by geometry design, typically through either awavy structure or cut network. [11] We believe that to realize ar eversibly stretchable elastic supercapacitor, following two material requirements must ...

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A flexible rechargeable aqueous zinc manganese-dioxide battery working at −20 °C

Abstract: In this paper, we propose the design of a family of hydrogel electrolytes that featuring freezing resistance, flexibility, safety, superior ionic conductivity and long-term stability to realize anti-freezing flexible aqueous batteries.

Cited by 532 publications

References 32 publications

Achieving High‐Voltage and High‐Capacity Aqueous Rechargeable Zinc Ion Battery by Incorporating Two‐Species Redox Reaction

Achieving High‐Voltage and High‐Capacity Aqueous Rechargeable Zinc Ion Battery by Incorporating Two‐Species Redox Reaction

Antifreezing Hydrogel with High Zinc Reversibility for Flexible and Durable Aqueous Batteries by Cooperative Hydrated Cations

A Highly Elastic and Reversibly Stretchable All‐Polymer Supercapacitor

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