共查询到19条相似文献,搜索用时 109 毫秒
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以1-甲基-3-乙基咪唑四氟硼酸离子液体和果糖为原料,微波作用下一步制得一种新型碳点离子液体复合物,用此复合物代替部分导电剂和粘结剂制成新型炭基超级电容器,并与传统的炭基超级电容器进行了比较研究。结果表明:所制复合物中有大量直径小于4nm的碳纳米粒子,70℃时电导率达到13.26×10–3S·cm–1。所制超级电容器充放电效率由传统炭基超级电容器的89.1%提高到97.3%,比电容由115.7 F.g–1提高到251.1 F·g–1,内阻由1.95Ω 降低为1.23Ω ,且循环性能显著提高。 相似文献
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超级电容器在汽车启动中的应用 总被引:2,自引:0,他引:2
根据超级电容器的结构特性,介绍在汽车启动过程中如何利用超级电容器减小对车内其他电子设备的干扰,改善汽车的启动性能,延长蓄电池使用寿命. 相似文献
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分析了超级电容器应用于电动汽车中的技术优势,介绍了国内外在超级电容器的研发、项目合作、超级电容电动车实际运营以及招商招标的活跃状态,指出了目前超级电容器的技术不足和发展希望。 相似文献
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电力电子元件是无源元件的总称,是构成电力电子设备的重要组成部分,是从事电力电子元件设计、研发、生产、营销和应用人员以及电源技术工作者应该熟悉的内容。本刊从今年4月份开始以电力电子元件知识为题与前述电力电子器件知识同时开展讲座,以满足广大读者增长知识和用好这些元件的需求。欢迎厂家及用户的工程师们撰稿,并望提出宝贵意见。 相似文献
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碳纳米管–聚吡咯复合材料在超电容器中的应用 总被引:4,自引:0,他引:4
在碳纳米管(CNT)基体上用化学聚合或电化学聚合方法沉积聚吡咯(PPy)制得复合材料。再以此类复合材料为活性物质制作电极,组装成原型超电容器。并对其进行了循环伏安、恒电流充放电等电化学测试。用此类复合材料制成的原型超电容器的比容量(23.6 F/g)与纯碳纳米管(2.3 F/g)或纯聚吡咯(3.9 F/g)制成的原型电容器比较,发现复合电极电容器比容量的提高不是简单的加和效应,而是协同效应所致。 相似文献
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Ruwei Chen Hao Tang Peng He Wei Zhang Yuhang Dai Wei Zong Fei Guo Guanjie He Xiaohui Wang 《Advanced functional materials》2023,33(8):2212078
The development of flexible electrodes with high mass loading and efficient electron/ion transport is of great significance but still remains the challenge of innovating suitable electrode structures for high energy density application. Herein, for the first time, lignosulfonate-derived N/S-co-doped graphene-like carbon is in situ formed within an interface engineered cellulose textile through a sacrificial template method. Both experimental and theoretical calculations disclose that the formed pomegranate-like structure with continuous conductive pathways and porous characteristics allows sufficient ion/electron transport throughout the entire structures. As a result, the obtained flexible electrode delivers a remarkable integrated capacitance of 6534 mF cm−2 (335.1 F g−1) and a superior stability at an industrially applicable mass loading of 19.5 mg cm−2. A pseudocapacitive cathode with ultrahigh capacitance of 7000 mF cm−2 can also be obtained based on the same electrode structure engineering. The as-assembled asymmetric supercapacitor achieves a high areal capacitance of 3625 mF cm−2, and a maximum energy density of 1.06 mWh cm−2, outperforms most of other reported high-loading supercapacitors. This synthesis method and structural engineering strategy can provide materials design concepts and a wide range of applications in the fields of energy storage beyond supercapacitors. 相似文献
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Xingjiang Wu Xude Yu Zekai Zhang Hengyuan Liu SiDa Ling Xueyan Liu Cheng Lian Jianhong Xu 《Advanced functional materials》2023,33(41):2300329
Fibrous supercapacitor (FSC) is of great attention in wearable electronics, but is challenged by low energy density, owing to disordered diffusion pathway and sluggish redox kinetics. Herein, using micro-reaction strategy, an anisotropic superstructure is developed by in situ anchoring ultrafine zinc sulfine (ZnS) nanoclusters on conductively ordered macro-microporous carbon skeleton via interfacial C S Zn bonds (ZnS/SOM-C). The anisotropic superstructure affords 3D ordered macro-microporous pathways, large accessible surfaces, and highly dispersed active sites, which exhibit enhanced electrolyte mass diffusion, rapid interfacial charge transfer, and large faradaic ions storage (capacitance of 1158 F g−1 in KOH aqueous solution). By microfluidic spinning, the ZnS/SOM-C is further assembled into fibrous electrode of FSC that delivers high capacitance (791 F g−1), commercial-level energy density (172 mWh g−1), and durable stability. As a result, the FSC can realize wearable self-powered applications (e.g., self-cleaning ventilatory mask, smartwatch, and display), exhibiting the superiority in new energy and wearable industry. 相似文献