In large-scale applications of portable and wearable electronic devices, high-performance supercapacitors are important energy supply sources. However, since the reliability and stability of ...supercapacitors are generally destroyed by mechanical deformation and damage during practical applications, the stretchability and self-healability must be exploited for the supercapacitors. Preparing the highly stretchable and self-healable electrodes is still a challenge. Here, we report reduced graphene oxide fiber based springs as electrodes for stretchable and self-healable supercapacitors. The fiber springs (diameters of 295 μm) are thick enough to reconnect the broken electrodes accurately by visual inspection. By wrapping fiber springs with a self-healing polymer outer shell, a stretchable and self-healable supercapacitor is successfully realized. The supercapacitor has 82.4% capacitance retention after a large stretch (100%), and 54.2% capacitance retention after the third healing. This work gave an essential strategy for designing and fabricating stretchable and self-healable supercapacitors in next-generation multifunctional electronic devices.
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IJS, KILJ, NUK, PNG, UL, UM
Colorectal cancer remains the third leading cause of cancer death worldwide, suggesting exploration of novel therapeutic avenues may be useful. In this study, therefore, we determined whether ...Tianfoshen oral liquid, a Chinese traditional medicine that has been used to treat non-small cell lung cancer, would be therapeutically beneficial for colorectal cancer patients. Our data show that Tianfoshen oral liquid effectively inhibits growth of colorectal cancer cells both in vitro and in vivo. We further employed a comprehensive strategy that included chemoinformatics, bioinformatics and network biology methods to unravel novel insights into the active compounds of Tianfoshen oral liquid and to identify the common therapeutic targets and processes for colorectal cancer treatment. We identified 276 major candidate targets for Tianfoshen oral liquid that are central to colorectal cancer progression. Gene enrichment analysis showed that these targets were associated with cell cycle, apoptosis, cancer-related angiogenesis, and chronic inflammation and related signaling pathways. We also validated experimentally the inhibitory effects of Tianfoshen oral liquid on these pathological processes, both in vitro and in vivo. In addition, we demonstrated that Tianfoshen oral liquid suppressed multiple relevant key players that sustain and promote colorectal cancer, which is suggests the potential therapeutic efficacy of Tianfoshen oral liquid in future colorectal cancer treatments.
With the rapid development of flexible electronic devices, current flexible energy storage devices face great challenge of achieving both high energy and power density. Exploiting ion capacitor is an ...intelligent way to improve the energy density without sacrificing the power density by utilizing the battery and capacitor-type energy storage mechanism. For the inspiration, a new flexible zinc-ion capacitor (FZIC) based on δ-MnO2@carbon cloth (δ-MnO2@CAC) battery-type cathode and MXene@cotton cloth (MXene@COC) capacitor-type anode has been designed and realized. The δ-MnO2@CAC//MXene@COC system in aqueous liquid electrolyte exhibits excellent electrochemical performance, e.g. a high energy density of 90 Wh kg−1 (power density of 239 W kg−1) and a high power density of 3838 W kg−1 (energy density of 26.8 Wh kg−1), a high capacitance retention of ~80.7% of its initial capacitance after 16,000 cycles and a high Coulomb efficiency of above 93.6% during all the cycles. Moreover, after being assembled by aqueous gel electrolyte, the FZIC also shows the superior electrochemical performance and excellent flexibility. This study of the FZIC provides an efficient way to develop the next-generation flexible energy storage devices with high performance.
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•A new flexible zinc-ion capacitor (FZIC) has been designed and realized.•The FZIC utilizes the both battery and capacitor-type energy storage mechanisms.•The FZIC shows the excellent electrochemical performance and flexibility.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
High-performance microsupercapacitors (MSCs) with three-dimensional (3D) structure provide an effective approach to improve the ability of energy storage. Because the electrodes with 3D structure are ...generally easily destroyed under mechanical deformation in practical applications, we fabricated a self-healable 3D MSC consisting of MXene (Ti3C2T x )–graphene (reduced graphene oxide, rGO) composite aerogel electrode by wrapping it with a self-healing polyurethane as an outer shell. The MXene–rGO composite aerogel combining large specific surface area of rGO and high conductivity of the MXene can not only prevent the self-restacking of the lamella structure but also resist the poor oxidization of MXene to a degree. The MSC based on a 3D MXene–rGO aerogel delivers a large area specific capacitance of 34.6 mF cm–2 at a scan rate of 1 mV s–1 and an outstanding cycling performance with a capacitance retention up to 91% over 15 000 cycles. The 3D MSC presents an excellent self-healing ability with specific capacitance retention of 81.7% after the fifth healing. The preparation of this self-healable 3D MSC can provide a method for designing and manufacturing next-generation long-life multifunctional electronic devices further to meet the requirements of sustainable development.
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IJS, KILJ, NUK, PNG, UL, UM
The rapid development of smart wearable and integrated electronic products has urgently increased the requirement for high‐performance microbatteries. Although few lithium ion microbatteries based on ...organic electrolytes have been reported so far, the problems, such as undesirable energy density, poor flexibility, inflammability, volatility toxicity, and high cost restrict their practical applications in the above‐mentioned electronic products. In order to overcome these problems, a low cost quasi‐solid‐state aqueous zinc ion microbattery (ZIMB) assembled by a vanadium dioxide (B)‐multiwalled carbon nanotubes (VO2 (B)‐MWCNTs) cathode, a zinc nanoflakes anode, and a zinc trifluoromethanesulfonate‐polyvinyl alcohol (Zn(CF3SO3)2‐PVA) hydrogel electrolyte is exploited. As expected, the ZIMB exhibits excellent electrochemical performance, e.g., a high capacity of 314.7 µAh cm−2, an ultrahigh energy density of 188.8 µWh cm−2, and a high power density of 0.61 mW cm−2. Furthermore, the ZIMB also shows high flexibility and excellent high temperature stability: the capacity has no obvious decay when the bending angle is up to 150° and the temperature reaches 100 °C. The ZIMB provides a way to develop next‐generation miniature energy storage devices with high performance.
An ultrahigh energy density quasi‐solid‐state zinc ion microbattery with excellent flexibility and thermostability based on a vanadium dioxide (B)‐multiwalled carbon nanotubes (VO2 (B)‐MWCNTs) cathode, a zinc nanoflakes anode, and a zinc trifluoromethanesulfonate‐polyvinyl alcohol (Zn(CF3SO3)2‐PVA) hydrogel electrolyte is successfully realized.
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FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SBCE, SBMB, UL, UM, UPUK
Although current energy storage devices are limited by their own shortcomings, their merits such as superior power density and cycling stability for supercapacitors (SCs), and high energy density for ...batteries cannot be ignored either. Constructing hybrid SCs (HSCs) with capacitor‐type electrodes and battery‐type electrodes can combine the advantages of SCs and batteries. Herein, a zinc‐ion HSC (ZHSC) is fabricated with a porous 3D MXene (Ti3C2Tx
)‐reduced graphene oxide aerogel cathode and zinc foil anode for the first time. As a result, the ZHSC exhibits excellent electrochemical performance with a high specific capacitance of 128.6 F g−1 at a current density of 0.4 A g−1 and a high energy density of 34.9 Wh kg−1 at a power density of 279.9 W kg−1. More importantly, after 75 000 charge and discharge cycles at a current density of 5 A g−1, the capacitance retention is still above 95% of the initial capacitance. This work provides a new way of thinking for developing high‐performance energy storage devices with superior energy, power density, and ultralong cycle life.
The MXene‐based zinc‐ion hybrid supercapacitor (ZHSC) exhibits a high energy density of 34.9 Wh kg−1 (279.9 W kg−1) and an ultralong cycle life (after 75 000 charge and discharge cycles, the capacitance retention is still above 95% of its initial capacitance), by utilizing both the battery and the capacitor‐type energy storage mechanism.
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FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SBCE, SBMB, UL, UM, UPUK
The requirement for rechargeable microbatteries (MBs) continues to increase due to the rapidly development of wearable and integrated electronics. However, the ever-reported mainstream MBs, such as ...lithium ion MBs, have intrinsic drawbacks of security threats and environmental hazards, and are not suitable as an energy supply component for wearable electronics. Here, a safe and environmentally friendly zinc ion microbattery (ZIMB) based on MXene-TiS2 (de)intercalation anode, multi-walled carbon nanotubes-vanadium dioxide (B) (MWCNTs-VO2 (B)) cathode, zinc sulfate-polyacrylamide (ZnSO4-PAM) hydrogel electrolyte and self-healable polyurethane (PU) protective shell is exploited. The ZIMB exhibit satisfactory electrochemical performance with a capacity of 40.8 μAh cm-2, maximum power density of 32.5 μWh cm-2 and maximum energy density of 1.2 mW cm-2. In addition, the ZIMB also exhibits the excellent flexibility, thermostability and self-healability, i.e., no significant attenuation in capacity can be observed when the ZIMB is placed on the specific conditions, such as the high bending angle of 150°, high temperature of 100 °C, and multiple damage and repair cycles. This study provides a feasible strategy to develop advanced high reliable and stable micro energy storage devices for wearable and integrated electronics.
•A “rocking-chair” zinc ion microbattery (ZIMB) has been designed and realized.•The MXene-TiS2 is used for the (de)intercalation anode of ZIMB.•The ZIMB exhibits the excellent flexibility, thermostability and self-healability.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
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