Investigation On The Solid Polymer Electrolyte And Anode Material Of 3-D Lithium-ion Microbattery Based On Si Micro-channel Plate

With the rapid development of electronic information technology, the electronic devices become miniaturization with high performance. Miniature power sources are needed for a variety of applications, including implantable medical devices, mobile communications, remote sensors, miniature transmitters, "smart" cards and backup power for PC memory. Lithium-ion batteries with green and superior performance quickly occupy the market. However, the main defect of low current and long charging time is holding back further upgrade of Traditional planar (2D) thin-film lithium ion batteries, thus, three-dimensional (3D) microbatteries have been proposed to overcome the deficiency of traditional 2D ones.This article introduces the three-dimensional lithium-ion batteries (3D) based on the silicon micro-channel plate (MCP) with high aspect ratio. The electroless plating was used to deposit a layer of nickel onto the silicon MCP. The nickel layer is conformal and smooth as a current collector of the 3D half cell.Then, a layer of molybdenum sulfide (MoS2) anode was deposited on the nickel coated silicon MCP by electro depo-sition. Electrochemical characterization of MoS2 was performed using Swagelok-type cells. In the first cycle, the MoS2 electrode delivers a lithium insertion capacity of about 1280 mAh/g, which is higher than that reported for MoS2 nanoflakes. The available charge capacity during the first cycle is as high as 1310 mAh/g which is three times that of the ideal capacity of a graphite electrode. Commercially available PVdF-HFP Copolymer (SOLEF 21216/1001) was chosen as the polymer electrolyte matrix.The solution was introduced to the silicon MCP by pumping and spinning repeatedly in order to deposit the electrolyte membrane on the MCP side-wall. The electrolyte PVdF-HFP inside the cuboid channels of MCP is successful deposited and the film is smooth and conformal. CNTs are one kind of potential materials for lithium storage, the electrophoretic deposition (EPD) is used to produce CNTs coatings in MCP, the success of CNTs coatings by EPD is the basis of CNTs anode for 3-D lithium-ion battery.