Highly Compressible Cross-Linked Polyacrylamide Hydrogel-Enabled Compressible Zn–MnO<sub>2</sub> Battery and a Flexible Battery–Sensor System

Wang, Zifeng; Mo, Funian; Ma, Longtao; Yang, Qi; Liang, Guojin; Liu, Zhuoxin; Li, Hongfei; Li, Na; Zhang, Haiyan; Chen, Zhi

doi:10.1021/acsami.8b17607

Cited by 111 publications

(91 citation statements)

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“…It is a sign of the potential power source in the smart and wearable electronics. The results of mechanical strength of hydrogel electrolyte and electrochemical performance of the flexible battery and sensor system are presented in Figure 27 [208]. Li et al reported poly (acrylamide) grafted with gelatin hydrogel electrolytes for a zinc ion flexible battery.…”

Section: Polymer Hydrogel Electrolytes For Batteriesmentioning

confidence: 99%

“…Compressibility of the poly (acrylamide) hydrogel electrolyte (PAAm). (a) Images showing the elasticity of hydrogel under compressional and relaxed states; (b) resistance values of the poly (acrylamide) hydrogel electrolyte under different compressional strain values from 0 to 77.8%; (c,d) pictures showing the conductivity of hydrogel electrolyte under relaxed and compressional states with the ability to light a yellow light-emitting diode (LED) bulb; (e) optical images showing that two rechargeable Zn-MnO 2 batteries with poly (acrylamide) hydrogel electrolytes could be used for powering a luminescent panel under normal condition and with a 3-kg load on it; (f) comparison between the signals generated by the flexible sensor powered by the commercially available alkaline batteries and our compressible batteries without and with q load on top of it; (g) flexible smart wristband integrated from two ZIB modules and a flexible pressure sensor; (h) sensory signals of the smart wristband generated by human finger touch under different pressures on the device; (i) sensory signals of the smart wristband generated at different frequencies, from 0.3 to 4 Hz, by human finger touch[208].…”

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confidence: 99%

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Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications

et al. 2020

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In the present review, we focused on the fundamental concepts of hydrogels—classification, the polymers involved, synthesis methods, types of hydrogels, properties, and applications of the hydrogel. Hydrogels can be synthesized from natural polymers, synthetic polymers, polymerizable synthetic monomers, and a combination of natural and synthetic polymers. Synthesis of hydrogels involves physical, chemical, and hybrid bonding. The bonding is formed via different routes, such as solution casting, solution mixing, bulk polymerization, free radical mechanism, radiation method, and interpenetrating network formation. The synthesized hydrogels have significant properties, such as mechanical strength, biocompatibility, biodegradability, swellability, and stimuli sensitivity. These properties are substantial for electrochemical and biomedical applications. Furthermore, this review emphasizes flexible and self-healable hydrogels as electrolytes for energy storage and energy conversion applications. Insufficient adhesiveness (less interfacial interaction) between electrodes and electrolytes and mechanical strength pose serious challenges, such as delamination of the supercapacitors, batteries, and solar cells. Owing to smart and aqueous hydrogels, robust mechanical strength, adhesiveness, stretchability, strain sensitivity, and self-healability are the critical factors that can identify the reliability and robustness of the energy storage and conversion devices. These devices are highly efficient and convenient for smart, light-weight, foldable electronics and modern pollution-free transportation in the current decade.

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Section: Polymer Hydrogel Electrolytes For Batteriesmentioning

confidence: 99%

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confidence: 99%

Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications

et al. 2020

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“…Currently, rechargeable aqueous zinc-ion batteries have attracted considerable attention for their high capacity, fast kinetics, and high safety [19][20][21][22]. These unique properties of zinc-ion batteries give us an inspiration for designing novel zinc-ion capacitors (ZIC) that is composed of zinc-ion insertion/extraction battery-type cathodes and suitable capacitor-type anodes.…”

Section: Introductionmentioning

confidence: 99%

A New Free-Standing Aqueous Zinc-Ion Capacitor Based on MnO2–CNTs Cathode and MXene Anode

et al. 2019

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HIGHLIGHTS • A new zinc-ion capacitor (ZIC) was realized by assembling the free-standing manganese dioxide-carbon nanotubes (MnO 2-CNTs) battery-type cathode and MXene (Ti 3 C 2 T x) capacitor-type anode in an aqueous electrolyte. • The large specific capacitance of the MXene anode avoids the mismatch in capacitance between the cathode and anode of the ZIC. • The superior performance of the proposed ZIC makes it a promising candidate for the next-generation energy storage devices. ABSTRACT Restricted by their energy storage mechanism, current energy storage devices have certain drawbacks, such as low power density for batteries and low energy density for supercapacitors. Fortunately, the nearest ion capacitors, such as lithium-ion and sodium-ion capacitors containing battery-type and capacitor-type electrodes, may allow achieving both high energy and power densities. For the inspiration, a new zinc-ion capacitor (ZIC) has been designed and realized by assembling the free-standing manganese dioxide-carbon nanotubes (MnO 2-CNTs) battery-type cathode and MXene (Ti 3 C 2 T x) capacitortype anode in an aqueous electrolyte. The ZIC can avoid the insecurity issues that frequently occurred in lithium-ion and sodium-ion capacitors in organic electrolytes. As expected, the ZIC in an aqueous liquid electrolyte exhibits excellent electrochemical performance (based on the total weight of cathode and anode), such as a high specific capacitance of 115.1 F g −1 (1 mV s −1), high energy density of 98.6 Wh kg −1 (77.5 W kg −1), high power density of 2480.6 W kg −1 (29.7 Wh kg −1), and high capacitance retention of ~ 83.6% of its initial capacitance (15,000 cycles). Even in an aqueous gel electrolyte, the ZIC also exhibits excellent performance. This work provides an essential strategy for designing next-generation high-performance energy storage devices.

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“…Intrinsic nonflammable aqueous electrolytes greatly revive aqueous batteries for their possible application in flexible configuration . Among various options of aqueous power sources, rechargeable Zn–MnO 2 batteries are emerging as one of the best candidates, owing to the high abundance and safety of both Zn and MnO 2 , as well as stable output voltage platform (≈1.5 V) of the whole device . Furthermore, the multiple ionic charge transport carriers enable Zn–MnO 2 batteries with large storage capacity and high energy density.…”

Section: Introductionmentioning

confidence: 99%

3D CNTs Networks Enable MnO₂ Cathodes with High Capacity and Superior Rate Capability for Flexible Rechargeable Zn–MnO₂ Batteries

et al. 2019

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The advancement of flexible rechargeable Zn–MnO2 batteries largely relies on directional design and fabrication of flexible cathode materials. However, the sluggish electron transfer and inferior mass diffusion rate of MnO2 cathodes hinder their application in high‐power systems. Herein, the design of flexible 3D carbon nanotube (CNT) conductive networks as excellent electron and charge transfer substrates is reported to achieve a high‐rate MnO2 cathode. With further structural protection of conductive poly(3,4‐ethylenedioxythiophene) (PEDOT), Zn2+ storage kinetics in the composite CNT/MnO2/PEDOT (denoted as CMOP) the cathode is optimized to deliver high capacity of 306.1 mAh g−1 at 1.1 A g−1 and superior rate capability of 176.8 mAh g−1 when the current density increases by tenfold (10.8 A g−1), representing a state‐of‐the‐art of current MnO2 based cathodes. Moreover, the as‐assembled quasi‐solid‐state Zn–CMOP batteries with good mechanical properties can afford a high energy density of 379.4 Wh kg−1 (17.5 mWh cm−3) and a peak power density of 17.1 kW kg−1 (0.8 W cm−3). This innovative achievement will be a critical step forward toward next‐generation quick charging electronics.

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Highly Compressible Cross-Linked Polyacrylamide Hydrogel-Enabled Compressible Zn–MnO₂ Battery and a Flexible Battery–Sensor System

Cited by 111 publications

References 50 publications

Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications

Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications

A New Free-Standing Aqueous Zinc-Ion Capacitor Based on MnO2–CNTs Cathode and MXene Anode

3D CNTs Networks Enable MnO₂ Cathodes with High Capacity and Superior Rate Capability for Flexible Rechargeable Zn–MnO₂ Batteries

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Highly Compressible Cross-Linked Polyacrylamide Hydrogel-Enabled Compressible Zn–MnO2 Battery and a Flexible Battery–Sensor System

Cited by 111 publications

References 50 publications

Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications

Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications

A New Free-Standing Aqueous Zinc-Ion Capacitor Based on MnO2–CNTs Cathode and MXene Anode

3D CNTs Networks Enable MnO2 Cathodes with High Capacity and Superior Rate Capability for Flexible Rechargeable Zn–MnO2 Batteries

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Highly Compressible Cross-Linked Polyacrylamide Hydrogel-Enabled Compressible Zn–MnO₂ Battery and a Flexible Battery–Sensor System

3D CNTs Networks Enable MnO₂ Cathodes with High Capacity and Superior Rate Capability for Flexible Rechargeable Zn–MnO₂ Batteries