40. 水系二次电池Aqueous Rechargeable Batteries.pdf
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1、Aqueous Rechargeable Batteries 1. A New FreeStanding Aqueous ZincIon Capacitor Based on MnO2-CNTs Cathode and MXene Anode 2. UltraHigh MassLoading Cathode for Aqueous ZincIon Battery Based on GrapheneWrapped Aluminum Vanadate Nanobelts 3. Novel Insights into Energy Storage Mechanism of Aqueous Recha
2、rgeable Zn/MnO2 Batteries with Participation of Mn2+ 4. NASICONStructured NaTi2(PO4)3 for Sustainable Energy Storage 5. V2O5 Nanospheres with Mixed Vanadium Valences as High Electrochemically Active Aqueous ZincIon Battery Cathode Vol.:(0123456789)1 3A New FreeStanding Aqueous ZincIon Capacitor Base
3、d on MnO2CNTs Cathode andMXene AnodeSiliangWang1,2, QiangWang1,2, WeiZeng1,2*, MinWang1,2, LiminRuan1,2, YananMa3* * Wei Zeng, ; Yanan Ma, 1 Key Laboratory ofIntelligent Computing andSignal Processing, Ministry ofEducation, Anhui University, No. 3 Feixi Road, Hefei230039, AnhuiProvince, PeoplesRepub
4、licofChina2 National Engineering Research Center forAgroEcological Big Data Analysis andApplication, School ofElectronics andInformation Engineering, Anhui University, No. 111 Jiulong Road, Hefei230601, AnhuiProvince, PeoplesRepublicofChina3 School ofSciences, Hubei University ofAutomotive Technolog
5、y, No. 167 Checheng West Road, Shiyan442002, HubeiProvince, PeoplesRepublicofChinaHIGHLIGHTS A new zincion capacitor (ZIC) was realized by assembling the freestanding manganese dioxidecarbon nanotubes (MnO2CNTs) batterytype cathode and MXene (Ti3C2Tx) capacitortype anode in an aqueous electrolyte. T
6、he large specific capacitance of the MXene anode avoids the mismatch in capacitance between the cathode and anode of the ZIC. The superior performance of the proposed ZIC makes it a promising candidate for the nextgeneration energy storage devices.ABSTRACT Restricted by their energy storage mechanis
7、m, current energy storage devices have certain drawbacks, such as low power density for batteries and low energy density for supercapacitors. Fortunately, the nearest ion capacitors, such as lithiumion and sodiumion capacitors containing batterytype and capacitortype electrodes, may allow achieving
8、both high energy and power densities. For the inspiration, a new zincion capacitor (ZIC) has been designed and realized by assembling the freestanding manganese dioxidecarbon nanotubes (MnO2CNTs) batterytype cathode and MXene (Ti3C2Tx) capacitortype anode in an aqueous electrolyte. The ZIC can avoid
9、 the insecurity issues that frequently occurred in lithiumion and sodiumion capacitors in organic electrolytes. As expected, the ZIC in an aqueous liquid electrolyte exhibits excellent electrochemical performance (based on the total weight of cathode and anode), such as a high specific capacitance o
10、f 115.1Fg1 (1mVs1), high energy density of 98.6Whkg1 (77.5Wkg1), high power density of 2480.6Wkg1 (29.7Whkg1), and high capacitance retention of 83.6% of its initial capacitance (15,000 cycles). Even in an aqueous gel electrolyte, the ZIC also exhibits excellent performance. This work provides an es
11、sential strategy for designing nextgeneration highperformance energy storage devices.KEYWORDS Energy storage; Zincion capacitor; Batterytype and capacitortype electrodes; MXene; Electrochemical performanceeDischargeAnodeCathodeChargeeeH2OSO4e2Zn2+ ISSN 23116706eISSN 21505551 CN 312103/TBARTICLECite
12、asNanoMicro Lett. (2019) 11:70 Received: 13 June 2019 Accepted: 13 August 2019 The Author(s) 2019https:/doi.org/10.1007/s4082001903011 NanoMicro Lett. (2019) 11:70 70 Page 2 of 12https:/doi.org/10.1007/s4082001903011 The authors1 IntroductionThe issues of energy depletion and greenhouse effect owing
13、 to the overconsumption of nonrenewable resources urgently require alternative green energy and efficient energy storage devices 13. Currently, batteries (e.g., lithiumion batteries, alkaline zincmanganese batteries, and leadacid batteries) and supercapacitors are the main energy storage devices 47.
14、 Owing to their clear advantages (e.g., higher power density, longer cycle life, better cycle stability, and higher safety), supercapacitors are more promising energy storage devices compared with batteries 810. However, restricted by their energy storage mechanisms, supercapacitors possess low ener
15、gy density 11, 12. To improve energy density without sacrificing the power density of supercapacitors, constructing ion capacitors, such as lithiumion or sodiumion capacitors, is possible. In the ion capacitors, batterytype electrodes and capacitortype electrodes are paired in electrolytes 1318. For
16、 example, in the lithiumion capacitor, the lithiumion batterytype anode (cathode) contributes a high capacity using the lithiumion insertion/extraction reaction, while the capacitortype cathode (anode) provides high power by rapid ion adsorption/desorption. Therefore, lithiumion capacitors possess h
17、igher energy density than supercapacitors and higher power density than batteries 16, 17. Although considerable progress has been made in the area of lithiumion and sodiumion capacitors, the following drawbacks severely restrict their practical application 14, 15. First, most lithiumion and sodiumio
18、n capacitors contain organic electrolytes that are flammable, volatile, and toxic. Second, the kinetics and capacitance mismatch owing to the sluggish kinetics of lithiumion and sodiumion batterytype electrodes and low specific capacitance of capacitortype electrodes in organic electrolytes bring hu
19、ge difficulties in implementing highperformance devices. Finally, determined by the intrinsic properties of lithiumion and sodiumion batterytype electrodes, the cycle life of these ion capacitors remains low. Therefore, employing new ion capacitor containing aqueous electrolytes that are safe and ha
20、ve long cycle life is essential.Currently, rechargeable aqueous zincion batteries have attracted considerable attention for their high capacity, fast kinetics, and high safety 1922. These unique properties of zincion batteries give us an inspiration for designing novel zincion capacitors (ZIC) that
21、is composed of zincion insertion/extraction batterytype cathodes and suitable capacitortype anodes. Many materials (e.g., such as manganesebased oxides, vanadiumbased oxides, Prussian blue analogs, Chevrel phase compounds, and polyanion compounds) have been used as the cathodes in zincion batteries
22、23, 24. Among these materials, manganesebased oxides, such as manganese dioxide (MnO2), have unique advantages of natural abundance, low toxicity, low cost, and multiple valence states of Mn 20, 21, which makes them potential batterytype cathode materials for ZIC.Activated carbon (AC) is commonly us
23、ed for a capacitortype electrode in lithiumion and sodiumion capacitors 16, 25, 26. However, using AC for capacitortype electrode has following two defects: (1) ACbased electrodes exhibit limited capacity owing to the energy storage mechanism of electrochemical doublelayer capacitors. (2) ACbased el
24、ectrodes require the binder and conductiveadditive, which increases the weight of the electrodes and decreases the final specific capacitance of the devices. Therefore, AC is unsuitable for the highperformance ZIC. MXene, a new type of twodimensional (2D) layered materials with the formula of Mn+1Xn
25、Tx (M represents the early transition metal, X represents carbon or nitrogen, and Tx represents F, O, and OH surface termination, n = 1, 2, 3), is extensively used in the field of energy storage owing to its superior properties of high conductivity, hydrophilic surface, and energy storage mechanism
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- 40. 水系二次电池Aqueous Rechargeable Batteries 水系 二次 电池 Aqueous