Decoupling electrolytes towards stable and high-energy rechargeable aqueous zinc–manganese dioxide batteries

Zhong, Cheng; Liu, Bin; Ding, Jia; Liu, Xiaorui; Zhong, Yuwei; Li, Yuan; Sun, Chengbo; Han, Xiaopeng; Deng, Yida; Zhao, Naiqin; Hu, Wenbin

doi:10.1038/s41560-020-0584-y

Cited by 530 publications

(390 citation statements)

References 55 publications

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“…In consideration of the high safety, low cost and fast kinetics, rapidly growing research interesting focuses on developing aqueous energy storage systems without flammable organic solvents. [ 11 ] Among them, the systems based on divalent Zn 2+ ions are attractive, because the Zn features environmental benignity, good compatibility with water solvent, low redox potential (−0.76 V vs. standard hydrogen electrode), and high theoretical capacities up to 820 mAh g −1 and 5855 mAh cm −3 . [ 12 ] Despite these advances, previously reported aqueous zinc‐based HESDs (Zn‐HESDs) exhibited limited energy densities due to the low specific capacities of AC cathode, particularly at high current densities of above 10 A g −1 (<100 mAh g −1 ), [ 13 ] which hinders their wide applications.…”

Section: Figurementioning

confidence: 99%

In Situ Two‐Step Activation Strategy Boosting Hierarchical Porous Carbon Cathode for an Aqueous Zn‐Based Hybrid Energy Storage Device with High Capacity and Ultra‐Long Cycling Life

Zhou

Zhang

et al. 2020

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Aqueous Zn‐based hybrid energy storage devices (HESDs) exhibit great potential for large‐scale energy storage applications for the merits of environmental friendliness, low redox potential, and high theoretical capacity of Zn anode. However, they are still subjected to low specific capacities since adsorption‐type cathodes (i.e., activated carbon, hard carbon) have limited capability to accommodate active ions. Herein, a hierarchical porous activated carbon cathode (HPAC) is prepared via an in situ two‐step activation strategy, different from the typical one‐step/postmortem activation of fully carbonized precursors. The strategy endows the HPAC with a high specific surface area and a large mesoporous volume, and thus provides abundant active sites and fast kinetics for accommodating active ions. Consequently, pairing the HPAC with Zn anode yields an aqueous Zn‐based HESD, which delivers a high specific capacity of 231 mAh g−1 at 0.5 A g−1 and excellent rate performance with a retained capacity of 119 mAh g−1 at 20 A g−1, the best result among previously reported lithium‐free HESDs based on carbon cathodes. Further, the aqueous Zn‐based HESD shows ultra‐long cycling stability with a capacity retention of ≈70% after 18 000 cycles at 10 A g−1, indicating great potential for environmentally friendly, low‐cost, and high‐safety energy storage applications.

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Section: Figurementioning

confidence: 99%

In Situ Two‐Step Activation Strategy Boosting Hierarchical Porous Carbon Cathode for an Aqueous Zn‐Based Hybrid Energy Storage Device with High Capacity and Ultra‐Long Cycling Life

Zhou

Zhang

et al. 2020

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121

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“…To find high-performance cathode materials for ZIBs, many attempts have been made [14]. Up to now, several types of ZIB cathode materials have been reported, including Mnbased materials [15][16][17][18][19][20][21][22], V-based materials [23][24][25][26][27][28][29], Prussian blue analogs [30][31][32], and some other cathode materials such as Mo 6 S 8 [33], quinone [34], and poly(benzoquinonyl sulfide) [35]. Mn-based materials, especially manganese oxides, possess the advantages such as low cost and environmental friendliness, but they suffer from the problems of rapid capacity fading and poor rate performance [36].…”

Section: Introductionmentioning

confidence: 99%

High-Performance Aqueous Zinc-Ion Batteries Realized by MOF Materials

et al. 2020

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“…But, only 50 cycles were achieved probably due to the poor reversibility of MnO 2 /Mn 2+ redox reaction. [ 13 ] Here, we introduce a novel electrode microskin (EMS) strategy and choose collagen hydrolysate (CH) material to adsorb/confine the dissolved Mn 2+ ions (as shown in Scheme 1 ). This makes one of the major side reactions, i.e., the MnO 2 /Mn 2+ redox reaction, reversible during the charge/discharge process, thereby enhances the cycle performance.…”

Section: Introductionmentioning

confidence: 99%

Mn²⁺ Ions Confined by Electrode Microskin for Aqueous Battery beyond Intercalation Capacity

Liu

Zhi

Sedighi

et al. 2020

Advanced Energy Materials

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In aqueous rechargeable zinc–manganese dioxide batteries (ZMBs), some irreversible side reactions, such as Mn2+ dissolution, often lead to capacity fading over cycling. These side reactions play a crucial role in the capacity and cycle performance of the battery. The implementation of a bionic electrode microskin (EMS) composed of collagen hydrolysate to convert the irreversible side reactions into reversible reactions is reported. The proposed EMS effectively adsorbs and confines the Mn2+ ions around the cathode through van der Waals forces, hydrogen bonds, and/or ionic interactions, which makes the MnO2/Mn2+ reactions reversible during the charge/discharge process. Such Mn2+ dissolution reactions, with an ultrahigh theoretical capacity (617 mAh g‐1), contribute a large amount of capacity, ≈44% of the total specific capacity at a low scan rate. Based on these fundamental findings, the assembled ZMBs with an EMS display an unprecedented discharge capacity of 415 mAh g‐1 at 20 mA g‐1, which overcomes the theoretical capacity (308 mAh g‐1) limitation of the Zn2+ intercalation mechanism. More significantly, the EMS on all α‐, β‐, and γ‐MnO2 cathodes exhibits similar high capacity beyond the theoretical capacity of Zn intercalation and capacity retention enhancement after 3000 cycles.

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Decoupling electrolytes towards stable and high-energy rechargeable aqueous zinc–manganese dioxide batteries

Cited by 530 publications

References 55 publications

In Situ Two‐Step Activation Strategy Boosting Hierarchical Porous Carbon Cathode for an Aqueous Zn‐Based Hybrid Energy Storage Device with High Capacity and Ultra‐Long Cycling Life

In Situ Two‐Step Activation Strategy Boosting Hierarchical Porous Carbon Cathode for an Aqueous Zn‐Based Hybrid Energy Storage Device with High Capacity and Ultra‐Long Cycling Life

High-Performance Aqueous Zinc-Ion Batteries Realized by MOF Materials

Mn²⁺ Ions Confined by Electrode Microskin for Aqueous Battery beyond Intercalation Capacity

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Decoupling electrolytes towards stable and high-energy rechargeable aqueous zinc–manganese dioxide batteries

Cited by 530 publications

References 55 publications

In Situ Two‐Step Activation Strategy Boosting Hierarchical Porous Carbon Cathode for an Aqueous Zn‐Based Hybrid Energy Storage Device with High Capacity and Ultra‐Long Cycling Life

In Situ Two‐Step Activation Strategy Boosting Hierarchical Porous Carbon Cathode for an Aqueous Zn‐Based Hybrid Energy Storage Device with High Capacity and Ultra‐Long Cycling Life

High-Performance Aqueous Zinc-Ion Batteries Realized by MOF Materials

Mn2+ Ions Confined by Electrode Microskin for Aqueous Battery beyond Intercalation Capacity

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Product

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Mn²⁺ Ions Confined by Electrode Microskin for Aqueous Battery beyond Intercalation Capacity