GP Batteries (China)

In the era of miniaturization, micro energy storage devices become an essential part of the progress in many fields starting from simple sensors to medical devices. However upcoming developments in all these fields are restricted to finding safe, reliable and high-performance micro batteries with the shapes that is not limited only to rectangles, cylinders, and pouches. The research is confronted with challenges of fitting a battery into a microdevice. Lithium-ion batteries (LIBs), a mature energy storage technology, are a leading candidate for the development of micro batteries that can be easily integrated into microelectronic devices. However, despite significant achievements in the field of micro batteries, limitations in areal capacity and in power densities still motivate the search for alternative designs and novel concepts in the battery field. Insufficient areal energy density from planar micro batteries has inspired a search for three-dimensional micro batteries. The power output of a three-dimensional micro battery is expected to be higher than that of a two-dimensional battery of equal size, as a result of the higher ratio of electrode-surface-area to volume and lower Ohmic losses. Within a battery electrode, the 3D architecture provides large surface area, increasing power by reducing the diffusion path for Li ions. Additive manufacturing, also known as 3D printing, has appeared as a novel class of free form fabrication technologies that have a variety of possibilities for the rapid creation of complex architectures at lower cost than conventional methods. 3D printing enables the controlled creation of functional materials with three-dimensional architectures, representing a promising approach for the fabrication of next-generation electrochemical energy-storage devices and has many unique advantages over conventional manufacturing methods. In this work, printer is employed to print a 3D micro battery with MXene electrodes that can be printed easily and can be fitted into any small device.

This paper investigates the electrochemical properties of Sn and Cu multilayers as anode materials for thin film Li ion batteries. The films were sequentially deposited on Cu foils using radio frequency magnetron sputtering system. Two, three, and four alternating layers of Sn/Cu were investigated for electrochemical properties. The results indicated improved capacity retention and rate capability for multilayers as compared to single layer Sn. This is attributed to the fact that inactive Cu layers improve physical adhesion and volume change of Sn upon lithiation. Multilayer structure of electrode with active/inactive components prove to be effective solution for thin film and microbatteries.AcknowledgementsThis work was supported by the projects 091019CRP2114 “Three-dimensional all solid state rechargeable batteries” from Nazarbayev University and OPFE2021001 “New materials and devices for defense and aerospace applications” Ministry of Digital Development, Innovation and Aerospace Industry of the Republic of Kazakhstan

Angewandte Chemie International EditionVolume 59, Issue 51 p. 22805-22824 Graphical AbstractFree Access Graphical Abstract: Angew. Chem. Int. Ed. 51/2020 First published: 07 December 2020 https://doi.org/10.1002/anie.202085111AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinked InRedditWechat Volume59, Issue51December 14, 2020Pages 22805-22824 RelatedInformation

In the last two decades, rechargeable Li-ion batteries have dominated the market. However, the increasing demand for energy storage creates new challenges for further use of lithium-ion batteries mainly due to the problems associated with limited energy density and high cost. To improve the specific energy of rechargeable batteries, a lithium-sulphur (Li-S) battery attracts particular interest in recent years as next-generation energy storage device due to its highest energy density (2600 Wh/kg) and theoretical capacity (1672 mAh/g) among all known systems. Furthermore, sulphur is cheap, abundant and environmentally benign. Despite this, due to its insulating nature, large volume changes during cycling of cell, and solubility of the polysulfides formed during these processes, the practical application of lithium-sulphur rechargeable batteries has not been successful yet [1]. To overcome these problems, we developed and investigated a free-standing and flexible carbon membrane as an interlayer between the sulfur/PANI composite cathode and the separator to prevent the shuttling of the intermediate polysulfides in Li-S batteries. Sulphur/PANI composites were prepared based on the as-prepared sulphur powder via a self-assembly process. 15 ml of aqueous suspension, containing 1 g sulphur was sonicated for 10min. 15 ml of aniline (An) monomer solution in water was dissolved into the suspension and stirred magnetically for 0.5 h at room temperature. pH of the suspension was adjusted to pH 2.0 with 1 M HCl solution then replaced into ice bath. A precooled FeCl3 aqueous solution was added into the resulting mixture together with diluted HCl. The mixture was reacted for 5 h at 0−5 °C. A black precipitate was separated by filtration and then thouroghly washed several times with deionized water, ethanol, acetone and 0.01 M HCl, and dried overnight under reduced pressure at room temperature to get the final composite product. Different molar ratio of aniline to sulphur were used to optimize the formation condition for preparation of the sulphur/PANI composites. Cathode electrodes were prepared by mixing 80 wt% sulphur/PANI, 10 wt% polyvinylidene fluoride (PVdF, Kynar, HSV900) as a binder and 10 wt% acetylene black as a conducting agent in 1-methyl-2-pyrrolidinone (NMP, Sigma-Aldrich). The resultant slurry was coated on aluminium foil as a current collector, and vacuum dried at 60 °C for 3 h. Free-standing and flexible carbon membranes have been prepared by mixing carbon source and a binder at different molar ratio, coated on aluminium foil and vacuum dried at 60 °C for 4 h. After drying the composite has been detached from aluminium foil, cuted and set between the sulphur/PANI cathode and separator (Celgard). Lihium metal used as anode. The coin cell type cells were assembled in an argon filled glove box (MBRAUN LABMASTER). 1 M LiPF6solution in EC:DMC:DEC (1:1:1) was used as electrolyte. In summary, we have successfully prepared flexible and free-standing carbon membrane for Li–S batteries. Carbon membrane adsorbed the intermediate polysulfides and prevented their shuttling, and a battery with the sulphur/PANI composite exhibited excellent lithium storage performance, enhanced cycle stability and high rate capacity. This publication has been made within the Sub-project #157-2013 which is funded under the Technology Commercialization Project, supported by the World Bank and the Government of the Republic of Kazakhstan Keywords: lithium-sulphur batteries, free-standing membrane, energy storage.

<div class="htmlview paragraph">The objective of the Project is to develop an optimized lead-acid battery solution for HEVs based on a novel, individual, spirally wound valve-regulated lead-acid 2V cell optimized for HEV use and low variability. This cell will be used as a building block for the development of a complete battery pack that is managed at the cell level. Following bench testing, this battery pack will be thoroughly evaluated by substituting it for the NiMH pack in a Honda Insight.</div> <div class="htmlview paragraph">The paper covers the first half of the 3-year project and will describe work carried out in the following areas:</div> <div class="htmlview paragraph"> <ul class="list disc"> <li class="list-item"><div class="htmlview paragraph">Development of cell and battery testing facilities and identification of mechanisms causing cell lifetime scatter.</div> </li> <li class="list-item"><div class="htmlview paragraph">The design and development of the prototype double-ended cell.</div> </li> <li class="list-item"><div class="htmlview paragraph">The development of the battery pack specification and pack design.</div> </li> <li class="list-item"><div class="htmlview paragraph">The development of the battery management system.</div> </li> </ul> </div> <div class="htmlview paragraph">The paper will also give details of the test results obtained on the demonstration vehicle with its original NiMH battery. Arising from these tests, there will be discussion of the merits of bench testing with a cycle derived from ‘real vehicle’ data as compared with the PNGV or Eucar power assist life cycle tests.</div>

International Journal of Clinical PracticeVolume 11, Issue 8 p. 610-611 Regular Features The Requirements and Cost of an Industrial Medical Service D. Malcolm MB, CHB, DIH, D. Malcolm MB, CHB, DIH Medical Officer Chloride Batteries Ltd., ManchesterSearch for more papers by this author D. Malcolm MB, CHB, DIH, D. Malcolm MB, CHB, DIH Medical Officer Chloride Batteries Ltd., ManchesterSearch for more papers by this author First published: 01 August 1957 https://doi.org/10.1111/j.1742-1241.1957.tb02393.xRead the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume11, Issue8August 1957Pages 610-611 RelatedInformation