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| 1 | Niobium Tungsten Oxide in a Green Water‑in‑Salt Electrolyte Enables Ultra‑Stable Aqueous Lithium‑Ion Capacitors显示文摘Aqueous hybrid supercapacitors are attracting increasing attention due to their potential low cost,high safety and eco-friendliness.However,the narrow operating potential window of aqueous electrolyte and the lack of suitable negative electrode materials seriously hinder its future applications.Here,we explore high concentrated lithium acetate with high ionic conductivity of 65.5 mS cm−1 as a green“water-in-salt”electrolyte,providing wide voltage window up to 2.8 V.It facilitates the reversible function of niobium tungsten oxide,Nb18W16O93,that otherwise only operations in organic electrolytes previously.The Nb18W16O93 with lithium-ion intercalation pseudocapacitive behavior exhibits excellent rate performance,high areal capacity,and ultra-long cycling stability.An aqueous lithium-ion hybrid capacitor is developed by using Nb18W16O93 as negative electrode combined with graphene as positive electrode in lithium acetate-based“water-in-salt”electrolyte,delivering a high energy density of 41.9 W kg−1,high power density of 20,000 W kg−1 and unexceptionable stability of 50,000 cycles. | Shengyang Dong Yi Wang Chenglong Chen Laifa Shen Xiaogang Zhang | 2020 | Nano-Micro Letters2020，12，12： | 4 |
| 2 | 钴基纳米晶-氮掺杂碳纳米笼复合材料的构建与电化学储能性能研究(英文)显示文摘Co(OH)2、CoO和Co3O4等钴基化合物因具有高理论容量和赝电容性质而备受关注.但受限于活性表面积小、电荷传输缓慢等原因,钴基纳米材料的实际储能性能却有限.本文以我们前期开发的具有大比表面积、高导电性和微孔-介孔-大孔共存的分级结构氮掺杂碳纳米笼(hNCNCs)为载体,成功构建了晶粒尺寸小、电荷转移快的系列钴基纳米晶-hNCNCs复合材料,有效地提高了活性材料的利用率.其中,Co(OH)2/hNCNCs在2 Ag ^-1下表现出1170 F g^-1的高比容量,基于活性物种Co(OH)2的比电容高达2214 Fg^-1,接近其理论值(2595 Fg^-1).研究发现,具有不同组成的Co(OH)2、CoO和Co3O4纳米晶通过相同的可逆氧化还原反应存储/释放电能.这种新的储能机理表明将碳基载体上的活性物种Co(OH)2转化为CoO或Co3O4的操作是非必要的,甚至可能损害其储能性能.本研究可为开发过渡金属化合物基高能量密度电极材料提供借鉴. | 麻青明 姚月坚 闫明磊 赵杰 葛承宣 吴强 杨立军 王喜章 胡征 | 2019 | Science China Materials2019，62，10： | 2 |
| 3 | PVP-Assisted Synthesis of Self-Supported Ni_(2)P@Carbon for High-Performance Supercapacitor显示文摘Highly conductive and stable electrode materials are usually the focus of high-performance supercapacitors.In this work,a unique design of Ni_(2)P@carbon self-supported composite nanowires directly grown on Ni foam was applied for a supercapacitor.The Co3O4 nanowire array was first synthesized on the Ni foam substrate,and the resulting Ni_(2)P@carbon nanocomposite was obtained by hydrothermally coating Co_(3)O_(4) with the Ni-ethylene glycol complex followed by gaseous phosphorization.We have discovered that the molecular weight of surfactant polyvinylpyrrolidone(PVP)used in the hydrothermal step,as well as the temperature for phosphorization,played very important roles in determining the electrochemical properties of the samples.Specifically,the sample synthesized using PVP with 10 k molecular weight and phosphorized at 300℃ demonstrated the best supercapacitive performance among the different samples,with the highest capacitance and most stable cyclic retention.When an asymmetric supercapacitor(ASC)was assembled with this Ni_(2)P@carbon sample as the cathode and activated carbon(AC)as the anode,the ASC device showed excellent capacitances of 3.7 and 1.6 F cm^(-2) at 2 and 50 mA cm^(-2),respectively,and it kept a high capacitance of 1.2 F cm^(-2) after 5000 cycles at a current rate of 25 mA cm^(-2).In addition,the ASC could reach a high energy density of about 122.8 Wh kg^(-1) at a power density of 0.15 kW kg^(-1) and 53.3 Wh kg^(-1) at the highest power density of 3.78 kW kg^(-1).Additionally,this device also had the ability to power up 16 red LEDs effortlessly,making it a strong candidate in electrochemical energy storage for practical usage. | Qian He Xiong Xiong Liu Rui Wu Jun Song Chen | 2019 | Research2019，，1： | 2 |
| 4 | Recent developments of stamped planar micro-supercapacitors: Materials,fabrication and perspectives显示文摘The rapid development of wearable and portable electronics has dramatically increased the application for miniaturized energy storage components.Stamping micro-supercapacitors(MSCs)with planar interdigital configurations are considered as a promising candidate to meet the requirements.In this review,recent progress of the different stamping materials and various stamping technologies are first discussed.The merits of each material,manufacturing process of each stamping method and the properties of stamping MSCs are scrutinized,respectively.Further insights on technical difficulties and scientific challenges are finally demonstrated,including the limited thickness of printed electrodes,poor overlay accuracy and printing resolution. | Fei Li Yang Li Jiang Qu Jinhui Wang Vineeth Kumar Bandari Feng Zhu Oliver G.Schmidt | 2021 | Nano Materials Science2021，3，2： | 2 |
| 5 | 3D printing of metal-based materials for renewable energy applications显示文摘Large-scale renewable energy must overcome conversion and storage challenges before it can replace fossil fuels due to its intermittent nature.However,current sustainable energy devices still suffer from high cost,low efficiency,and poor service life problems.Recently,porous metal-based materials have been widely used as desirable cross-functional platforms for electrochemical and photochemical energy systems for their unique electrical conductivity,catalytic activity,and chemical stability.To tailor the porosity length scale,ordering,and compositions,3D printing has been applied as a disruptive manufacturing revolution to create complex architected components by directly joining sequential layers into designed structures.This article intends to summarize cutting-edge advances of metal-based materials for renewable energy devices(e.g.,fuel cells,solar cells,supercapacitors,and batteries)over the past decade. | Shahryar Mooraj Zhen Qi Cheng Zhu Jie Ren Siyuan Peng Liang Liu Shengbiao Zhang Shuai Feng Fanyue Kong Yanfang Liu Eric B.Duoss Sarah Baker Wen Chen | 2021 | Nano Research2021，14，7： | 1 |
| 6 | Highly Sensitive Pseudocapacitive Iontronic Pressure Sensor with Broad Sensing Range显示文摘Flexible pressure sensors are unprecedentedly studied on monitoring human physical activities and robotics.Simultaneously,improving the response sensitivity and sensing range of flexible pressure sensors is a great challenge,which hinders the devices’practical application.Targeting this obstacle,we developed a Ti_(3)C_(2)T_(x)-derived iontronic pressure sensor(TIPS)by taking the advantages of the high intercalation pseudocapacitance under high pressure and rationally designed structural configuration.TIPS achieved an ultrahigh sen-sitivity(S_(min)>200 kPa^(−1),S_(max)>45,000 kPa^(−1))in a broad sensing range of over 1.4 MPa and low limit of detection of 20 Pa as well as stable long-term working durability for 10,000 cycles.The practical application of TIPS in physical activity monitoring and flexible robot manifested its versatile potential.This study provides a demonstration for exploring pseudocapacitive materials for building flexible iontronic sensors with ultrahigh sensitivity and sensing range to advance the development of high-performance wearable electronics. | Libo Gao Meng Wang Weidong Wang Hongcheng Xu Yuejiao Wang Haitao Zhao Ke Cao Dandan Xu Lei Li | 2021 | Nano-Micro Letters2021，13，9： | 1 |
| 7 | 赝电容的起源和本体相赝电容的实现显示文摘因兼具高能量密度、高功率密度和长循环寿命,赝电容材料引领了近年来超级电容器的发展。然而,赝电容材料仍面临着储能机制认知不足、未来发展方向模糊等挑战。本文基于国家自然科学基金重点项目“高能量/高功率电池型超级电容器-离子插层储能的电极材料构筑”的部分研究成果以及最新的文献报道,以典型赝电容材料为纲,简要回顾赝电容材料发展历史、重点讨论赝电容材料的储能机制、指出其储能机制中亟待厘清的问题。并在此基础上,提出赝电容材料未来发展的新思路-本体相赝电容,讨论了实现本体相赝电容的关键着力点和初步策略。 | 董韬文 张伟 郑伟涛 | 2024 | 硅酸盐学报2024，52，2： | 0 |
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