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All Si3N4 Nanowires Membrane Based High‐Performance Flexible Solid‐State Asymmetric Supercapacitor
Small ( IF 13.0 ) Pub Date : 2021-03-24 , DOI: 10.1002/smll.202008056 Xuemin Yin 1 , Hejun Li 1 , Liyuan Han 1 , Jiachen Meng 1 , Jinhua Lu 1 , Qiang Song 1
Small ( IF 13.0 ) Pub Date : 2021-03-24 , DOI: 10.1002/smll.202008056 Xuemin Yin 1 , Hejun Li 1 , Liyuan Han 1 , Jiachen Meng 1 , Jinhua Lu 1 , Qiang Song 1
Affiliation
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Recently, much attention has been drawn in the development of flexible energy storage devices due to the increasing demands for flexible/portable electronic devices with high energy density, low weight, and good flexibility. Herein, vertically oriented graphene nanosheets (VGNs) are in situ fabricated on the surface of free‐standing and flexible Si3N4 nanowires (NWs) membrane by plasma‐enhanced chemical vapor deposition (PECVD), which are directly used as flexible nanoscale conductive substrates. NiCo2O4 hollow nanospheres (HSs) and FeOOH amorphous nanorods (NRs) are finally prepared on Si3N4NWs@VGNs, which are served as the positive and negative electrodes, respectively. Profiting from the structural merits, the synthesized Si3N4NWs@VGNs@NiCo2O4HSs and Si3N4NWs@VGNs@FeOOHNRs membrane electrodes exhibit remarkable electrochemical performance. Using Si3N4NWs membrane as the separator, the assembled all Si3N4NWs membrane‐based flexible solid‐state asymmetric supercapacitor (ASC) with a wide operating potential window of 1.8 V yields the outstanding energy density of 96.3 Wh kg−1, excellent cycling performance (91.7% after 6000 cycles), and good mechanical flexibility. More importantly, this work provides a rational design strategy for the preparation of flexible electrode materials and broadens the applications of Si3N4NWs in the field of energy storage.
中文翻译：
所有基于Si3N4纳米线的膜高性能高性能柔性固态不对称超级电容器
近来，由于对具有高能量密度，低重量和良好柔性的柔性/便携式电子设备的需求不断增长，在柔性能量存储设备的开发中引起了很多关注。本文中，通过等离子增强化学气相沉积（PECVD）在独立的柔性Si 3 N 4纳米线（NWs）膜表面上原位制备了垂直取向的石墨烯纳米片（VGN），该膜直接用作柔性纳米级导电材料基材。镍钴2 ø 4中空纳米球（HSS）和无定形的FeOOH纳米棒（NRS）的最终制备在Si 3 Ñ 4NWs@VGNs，分别用作正电极和负电极。得益于结构优点，合成的Si 3 N 4NWs @ VGNs @ NiCo 2 O 4HSs和Si 3 N 4NWs @ VGNs @ FeOOH NRs膜电极表现出显着的电化学性能。使用Si 3 N 4NWs膜作为隔板，组装后的所有基于Si 3 N 4NWs膜的柔性固态非对称超级电容器（ASC）具有1.8 V的宽工作电势窗，可产生96.3 Wh kg -1的出色能量密度，出色的循环性能（6000次循环后为91.7％）和良好的机械柔韧性。更重要的是，这项工作为制备柔性电极材料提供了合理的设计策略，并拓宽了Si 3 N 4NW在储能领域的应用。
更新日期：2021-05-06
中文翻译：
所有基于Si3N4纳米线的膜高性能高性能柔性固态不对称超级电容器
近来，由于对具有高能量密度，低重量和良好柔性的柔性/便携式电子设备的需求不断增长，在柔性能量存储设备的开发中引起了很多关注。本文中，通过等离子增强化学气相沉积（PECVD）在独立的柔性Si 3 N 4纳米线（NWs）膜表面上原位制备了垂直取向的石墨烯纳米片（VGN），该膜直接用作柔性纳米级导电材料基材。镍钴2 ø 4中空纳米球（HSS）和无定形的FeOOH纳米棒（NRS）的最终制备在Si 3 Ñ 4NWs@VGNs，分别用作正电极和负电极。得益于结构优点，合成的Si 3 N 4NWs @ VGNs @ NiCo 2 O 4HSs和Si 3 N 4NWs @ VGNs @ FeOOH NRs膜电极表现出显着的电化学性能。使用Si 3 N 4NWs膜作为隔板，组装后的所有基于Si 3 N 4NWs膜的柔性固态非对称超级电容器（ASC）具有1.8 V的宽工作电势窗，可产生96.3 Wh kg -1的出色能量密度，出色的循环性能（6000次循环后为91.7％）和良好的机械柔韧性。更重要的是，这项工作为制备柔性电极材料提供了合理的设计策略，并拓宽了Si 3 N 4NW在储能领域的应用。
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