Achieving Ultrahigh Capacity with Self-Assembled Ni(OH)2 Nanosheet-Decorated Hierarchical Flower-like MnCo2O4.5 Nanoneedles as Advanced Electrodes of Battery–Supercapacitor Hybrid Devices

Liu, Yilin; Li, Huaming; Wang, Gui‐Gen; Zhang, Huayu; Dang, Le‐Yang; Wu, Bowen; Lin, Zhao-Qin; An, Xiao-Shuai; Han, Jiecai

doi:10.1021/acsami.8b21803

Cited by 84 publications

(28 citation statements)

References 63 publications

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“…Therefore, much research attention has focused on improving the potential range and energy density, either by using asymmetric cell assembly or by adopting the battery-supercapacitors hybrid electrode materials 16 – 18 . Recently, enormous efforts have been made for the realization of a hybrid combination of electric double layer capacitive (EDLC) material and pseudocapacitive/ battery-type material to combine the characteristic feature and potential ranges of both 17 , 19 .…”

Section: Introductionmentioning

confidence: 99%

Textile-based supercapacitors for flexible and wearable electronic applications

Sundriyal

Bhattacharya

2020

Sci Rep

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Electronic textiles have garnered significant attention as smart technology for next-generation wearable electronic devices. The existing power sources lack compatibility with wearable devices due to their limited flexibility, high cost, and environment unfriendliness. In this work, we demonstrate bamboo fabric as a sustainable substrate for developing supercapacitor devices which can easily integrate to wearable electronics. The work demonstrates a replicable printing process wherein different metal oxide inks are directly printed over bamboo fabric substrates. The MnO 2-nico 2 o 4 is used as a positive electrode, rGO as a negative electrode, and LiCl/PVA gel as a solid-state electrolyte over the bamboo fabrics for the development of battery-supercapacitor hybrid device. The textile-based MnO 2-nico 2 o 4 //rGO asymmetric supercapacitor displays excellent electrochemical performance with an overall high areal capacitance of 2.12 F/cm 2 (1,766 F/g) at a current density of 2 mA/cm 2 , the excellent energy density of 37.8 mW/cm 3 , a maximum power density of 2,678.4 mW/ cm 3 and good cycle life. Notably, the supercapacitor maintains its electrochemical performance under different mechanical deformation conditions, demonstrating its excellent flexibility and high mechanical strength. The proposed strategy is beneficial for the development of sustainable electronic textiles for wearable electronic applications. Smart electronic textiles have recently gained a lot of attention as a viable solution for the upcoming wearable electronics era 1,2. The electronic textiles/ garments have demonstrated enormous potential in various applications such as; healthcare monitoring devices, environmental monitoring devices, military applications, entertainment, fashion technology etc 2-4. Recently, the development of different textile-based electronic devices (like; wearable displays, wearable sensors, memory devices, and wearable transistors) have received greater attention from the scientific and engineering community, and their development is carried out on a rapid pace 4-6. However, one of the major challenges for commercialization and further growth of wearable electronics is the lack of a compatible power supply that may possess the same level of flexibility, durability, weight, biocompatibility, and strength as the device itself 7,8. The conventional energy storage devices fail to address these needs due to their rigid and bulky nature and also their inability to mount/perform on moving surfaces as is a critical need of wearable devices mounted on human and other beings 1,9-11. Therefore, there exists a strong need for the development of flexible and high-performance energy storage devices which can be easily integrated with wearable electronics. Among the various energy storage devices, thin and flexible supercapacitors are gaining more consideration for wearable electronics due to their salient features, such as excellent lifetime, lightweight, high power density, and their ability to deliver under mechanical deformation co...

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Section: Introductionmentioning

confidence: 99%

Textile-based supercapacitors for flexible and wearable electronic applications

Sundriyal

Bhattacharya

2020

Sci Rep

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“…For pseudocapacitive materials, conductive polymers have attracted great attention due to their large theoretical capacitance, better capacity retention, low toxicity, and eco-friend [24][25][26]. The excellent conductivity, electrochemical performance, and stability make polyaniline (PANI) is considered as an ideal choice for electrode materials.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Electrochemical Performance of PVA/CNT/PANI Flexible Films as Electrodes for Supercapacitors

et al. 2020

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The flexible and rechargeable energy storage device with excellent performance is highly desired due to the demands of portable and wearable devices. Herein, by integrating the bendability and stretchability of Polyvinyl alcohol (PVA), pseudocapacitance of Polyaniline (PANI), and the charge transport ability of carbon nanotubes (CNTs), PVA/CNT/PANI flexible film was fabricated as supercapacitor electrodes with excellent electrochemical performance and flexibility. Full-solid supercapacitor is prepared based on PVA/H 2 SO 4 gel electrolyte and as-prepared film electrodes. The device achieves an areal capacitance of 196.5 mF cm -2 with high cycling stability. The flexible properties of PVA, the conductivity of CNT, and the pseudo-capacitance of PANI contribute to the superior performance. Present work develops a facile and effective way for preparing flexible electrode materials. Graphical Abstract In present work, we fabricated PVA/CNT/PANI flexible film as supercapacitor electrodes with excellent electrochemical performance and flexibility.

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“…The X-ray diffraction (XRD) pattern of the pristine product (black line) in Figure 2 a shows diffraction peaks at 19°, 31.2°, 36.8°, 38.5°, 44.8°, 55.7°, 59.5°, and 65.3° corresponding to the (111), (220), (311), (222), (400), (422), (511), and (440) planes of spinel MnCo 2 O 4.5 (JCPDS card 32-0297) [ 35 , 36 , 37 ] in addition to the characteristic peak at 26.5° associated with the (002) plane of CC. After the PDA-coated NWs treated at 500 °C (S-500, blue line), the diffraction peak of spinel MnCo 2 O 4.5 disappears and new broad peaks arising from CoO (JCPDS card 78-0431) and overlapping peaks from the characteristic peaks of MnO (JCPDS card 75-0625) appear indicating that the MnCo 2 O 4.5 NWs have been converted to a mixture of MnO/CoO NWs consistent with previous reports [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

In-Situ Synthesis of Heterostructured Carbon-Coated Co/MnO Nanowire Arrays for High-Performance Anodes in Asymmetric Supercapacitors

Zhang

Song

et al. 2020

Molecules

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Structural design is often investigated to decrease the electron transfer depletion in/on the pseudocapacitive electrode for excellent capacitance performance. However, a simple way to improve the internal and external electron transfer efficiency is still challenging. In this work, we prepared a novel structure composed of cobalt (Co) nanoparticles (NPs) embedded MnO nanowires (NWs) with an N-doped carbon (NC) coating on carbon cloth (CC) by in situ thermal treatment of polydopamine (PDA) coated MnCo2O4.5 NWs in an inert atmosphere. The PDA coating was carbonized into the NC shell and simultaneously reduced the MnCo2O4.5 to Co NPs and MnO NWs, which greatly improve the surface and internal electron transfer ability on/in MnO boding well supercapacitive properties. The hybrid electrode shows a high specific capacitance of 747 F g−1 at 1 A g−1 and good cycling stability with 93% capacitance retention after 5,000 cycles at 10 A g−1. By coupling with vanadium nitride with an N-doped carbon coating (VN@NC) negative electrode, the asymmetric supercapacitor delivers a high energy density of 48.15 Wh kg−1 for a power density of 0.96 kW kg−1 as well as outstanding cycling performance with 82% retention after 2000 cycles at 10 A g−1. The electrode design and synthesis suggests large potential in the production of high-performance energy storage devices.

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Achieving Ultrahigh Capacity with Self-Assembled Ni(OH)₂ Nanosheet-Decorated Hierarchical Flower-like MnCo₂O_4.5 Nanoneedles as Advanced Electrodes of Battery–Supercapacitor Hybrid Devices

Cited by 84 publications

References 63 publications

Textile-based supercapacitors for flexible and wearable electronic applications

Textile-based supercapacitors for flexible and wearable electronic applications

Fabrication and Electrochemical Performance of PVA/CNT/PANI Flexible Films as Electrodes for Supercapacitors

In-Situ Synthesis of Heterostructured Carbon-Coated Co/MnO Nanowire Arrays for High-Performance Anodes in Asymmetric Supercapacitors

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