Time filter

Source Type

Bao T.,Wuhan University | Zhong H.,Wuhan University | Zhong H.,Tianjin Institute of Power Source | Zhan H.,Wuhan University | Zhou Y.,Wuhan University
Electrochimica Acta | Year: 2015

Abstract Nano-FeF3/graphene composite is successfully fabricated by an in-situ method. The structure and morphology of the samples are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effect of different processing conditions and different carbon sources is investigated. The electrochemical performance of FeF3/graphene is examined by discharge/charge and electrochemical impedance measurements. The results show that the less than 5% graphene-containing composite exhibits high capacity, stable cycling, and outstanding rate capability. The ultrafine particle size and the homogeneous network between FeF3 and graphene both contribute to the excellent electrochemical property. © 2015 Elsevier Ltd.


Li C.,Shanghai University | Han K.,Shanghai University | Li J.,Shanghai University | Zhang H.,Tianjin Institute of Power Source | And 5 more authors.
Organic Letters | Year: 2012

Three pillar[5]arene dimers, bridged by a flexible aliphatic chain (H1) or a relatively rigid phenylene unit (H2 and H3), were synthesized, with the possible synthetic strategies being discussed. The dimers could significantly enhance the binding affinities toward neutral model substrates in comparison with monomeric 1,4-dimethoxypillar[5]arene (H4) through the cooperative binding of two pillar[5]arene moieties. The molecular binding ability and selectivity are discussed from the viewpoints of the size/shape-fit concept and multiple recognition mechanism. © 2011 American Chemical Society.


Kang B.,Jilin University | Kang B.,Tianjin Institute of Power Source | Zhang W.,Jilin University | Lin H.,Jilin University | And 3 more authors.
Chemical Research in Chinese Universities | Year: 2016

Thermal batteries(TBs) as primary power sources are widely applied in defense and military affairs, and used in electronic packages and nuclear weapons. The activation time(AT) of TBs restricts the reactive speed of them. Therefore, it is a remarkably important parameter and needs to be studied in detail. In our previous study, the thermal transfer model has already been found during the activation process in TBs. In this work, the experimental TBs were fabricated and tested for validating the model. The error between the average value of test and calculation value from this model is less than 1%. As a result, the thermal transfer function for the activation process in the given TBs[FeS2/LiCl-KCl(MgO)/LiSi containing Fe/KClO4 heat pellet] is suggested. © 2016, Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH.


An W.,Tsinghua University | Xu S.,Tsinghua University | Yang F.,Tsinghua University | Gao J.,Tianjin Institute of Power Source
IEEE Transactions on Antennas and Propagation | Year: 2014

A Ka-band reflectarray antenna integrated with solar cells has been designed, manufactured and tested. The electromagnetic characteristics of solar cells as antenna substrates have been studied and measured. The simulation and measurement results of a reflectarray antenna prototype show good radiation characteristics with measured gain of 26.3 dBi and 1-dB gain bandwidth of 8.75%, while having an optical blockage of 17.6% on solar energy. The proposed technique integrates the two largest components on a satellite platform-solar cells and high gain antennas into one, significantly reducing the volume, mass and cost of satellites. © 2014 IEEE.


Zhong H.,Hubei University | Zhong H.,Tianjin Institute of Power Source | Yang Y.,Hubei University | Ding F.,Tianjin Institute of Power Source | And 3 more authors.
Chemical Communications | Year: 2015

The Si-MnOOH composite electrode exhibits very stable cycling and excellent rate capability, such as 1200 mA h g-1 at 12 A g-1, and 700 mA h g-1 at 20 A g-1. The γ-MnOOH component significantly promotes the alloying/de-alloying reaction between Si and lithium. © The Royal Society of Chemistry 2015.


Zong J.,Tianjin University | Zong J.,Tianjin Institute of Power Source | Diao Y.,Tianjin Institute of Power Source | Ding F.,Tianjin Institute of Power Source | And 3 more authors.
Ionics | Year: 2016

In order to realize a wider application for graphene materials specifically in the field of energy storage, a simple and mass-scalable method described as “the atmospheric, low-temperature, shock-heating process” is proposed in this work. During this low-temperature process, the graphite oxide without pre-treatment is completely exfoliated to form the few-layer graphene materials at atmospheric conditions. The Brunauer-Emmett-Teller (BET)-specific surface area of acquired material at 350 °C can reach 487 m2 g−1. The acquired few-layer graphene materials are also confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HRTEM). The results demonstrate that this simple method is feasible for synthesizing the few-layer graphene materials. Besides that, the acquired graphene is also used as the cathode material in the surface-enabled lithium ion-exchanging cell. The galvanostatic charge/discharge tests show that the graphene prepared from this method is suitable for this system and displays a satisfactory electrochemical performance. The acquired graphene sample exhibits the reversible capacities of around 187, 107, 84, 58, and 45 mAh g−1 at 0.1, 2, 5, 10, and 15 A g−1, respectively. At the current density of 0.5 A g−1, the capacity retention can reach 75 % after 2000 cycles. © 2016 Springer-Verlag Berlin Heidelberg


Yang T.,Tianjin University | Sang L.,Tianjin Institute of Power Source | Ding F.,Tianjin Institute of Power Source | Zhang J.,Tianjin Institute of Power Source | And 2 more authors.
Electrochimica Acta | Year: 2012

The properties of interfaces of water-stable lithium electrode have been investigated by EIS in Li-air batteries and four-electrode test-cells. The water-stable lithium electrode was prepared with the protection of NASICON-type glass-ceramic plate [0.8Li 2O·0.25Al 2O 3·1.5GeO 2·1.5P 2O 5 glass-ceramic (LAGP)]. The glass-ceramic plates are water-stable and 200-500 μm thick with ion-conductivity of 4 × 10 -4 S cm -1. In Li-air batteries, the AC impedance spectra of LAGP protected lithium electrode contained two semicircles and became three after one week. The composition of impedance of LAGP protected lithium electrode was analyzed, by comparison on the impedance spectra of LAGP protected lithium electrode and bare Li metal electrode in organic electrolyte. Furthermore, in four-electrode test-cell which excluded the LAGPaqueous-solution interface, the interface impedance of LAGP plate was analyzed. And then by the analysis of impedance, the Liorganic-electrolyte interface caused the main impedance of the water-stable lithium electrode during the discharge. The impedance of water-stable lithium electrode should be decreased by the study of new electrolyte and interface modification. © 2012 Elsevier Ltd. All rights reserved.


Yang T.,Tianjin University | Liu X.,Tianjin University | Liu X.,Tianjin Institute of Power Source | Sang L.,Tianjin Institute of Power Source | Ding F.,Tianjin Institute of Power Source
Journal of Power Sources | Year: 2013

The discharge performance of the water-stable lithium electrode (WSLE) is improved by introducing the surface modification of the glass-ceramic plate (LAGP and LATP). The water-stable lithium electrodes are prepared with the NASICON-type glass-ceramic plates as protection layer, and using organic electrolyte as interlayer. The glass-ceramic plates with ionic conductivity of 4 × 10-4-5.7 × 10-4 S cm-1 are waterstable and 300-500 μm thick. The modified layer is deposited onto the glass-ceramic plates by RF magnetron sputtering from a Li4Ti5O12 target. The modified layer is analyzed by XRD, SEM-EDX, Raman and XPS. The Li-air test-cells are assembled with an SCE as reference electrode in aqueous solution. In the Li-air test-cells, the AC impedance and constant polarization potential measurements are carried out to identify the improvement of modification. The impedance of interface between the glass-ceramic plate and organic electrolyte decreases about 20-50%. Consequently, the discharge current is promoted about 70-80%. Then, by introducing interfacial modification of glass-ceramic plate, the power performance of WSLE is remarkably promoted. © 2013 Elsevier B.V. All rights reserved.

Loading Tianjin Institute of Power Source collaborators
Loading Tianjin Institute of Power Source collaborators