Novel Germanium/Polypyrrole Composite for High Power Lithium-ion Batteries - lithium ion battery manufacturers
Nano-
Ge/polysilicone composite was synthesized in aqueous solution by chemical reduction method.
The Ge nanoparticles are directly coated on the surface of the Poly yr.
The morphological and structural properties of the sample were determined by X-
X-ray diffraction, scanning electron microscopy and transmission electron microscopy.
The content of polysilicone was determined by thermal weight analysis.
The electrical properties of the samples and their applicability as lithium negative electrode materials were studied.
The ion battery was checked.
Discharge capacity of Ge-calculated Ge nanoparticles
After 50 cycles at 0, the polysilicone composite is 1014 mah g-1.
2 mah c rate, much higher than the original ge (439 mah g-1.
The composite also shows a high specific discharge capacity at different current rates (1318 mah g-1 at 1032, 661, 460 and 0. 5, 1. 0, 2. 0, and 4.
0 u2005 C respectively ).
Excellent electrical performance of Ge-
The Poly-Fang ring composite can be attributed to the poly-Fang ring core, which provides an effective transmission path for electrons.
The SEM image of the electrode shows that the Poly yr ring can also be used as a conductive adhesive to alleviate the electrode crushing caused by the huge volume change of the Nano ge particles during the Li insertion/stripping process. intercalation.
Polyboron powder was synthesized by chemical oxidation in aqueous solution.
1g monomer and month. 96u2005g sodium p-
Toluene Shu ester (PTS Na) is dispersed in distilled water.
The polymerization was then initiated by dropping and adding the oxidation agent, iron chloride (FeCl) aqueous solution.
As shown when the suspension turns black, py is obtained after stirring for 12 km/h h.
The product is obtained by removing ionic water filtration and washing, and then vacuum drying at 60 °c for 12 hours.
Ge nanoparticles are made by one-
Step water reaction. 0. 26u2005g GeO and 0.
01g of polyethylene-based pyrrole ketone (PVP) was completely dissolved in 10 ml 0 ).
Sodium hydroxide solution of 15 m, and then adjust the pH of the solution to 7 with 0. 5u2005M HCl.
Then, in a water bath at 60 °c, NaBH aqueous solution is added under strong magnetic stirring.
After 3 u2005 h, dark brown suspended solids are formed, then the resulting powder is obtained by centrifugal, washed several times with deionized water, and dried in vacuum for 12 u2005 h.
Prepare for Ge-
Composite material,-
The prepared polyboron powder (50 mg) was dispersed in the solution before the reaction. X-
X-ray diffraction (X-ray diffraction) analysis was performed using gbc mma generator with Cu k α radiation and diffraction and graphite monometer.
Raman spectroscopy is used to characterize-
Py and py were prepared in composite materials using a jobin yvon HR800 co-focal Raman system with 632.
8 nm diode laser excitation on 300 line mm grating at room temperature.
In the air from 50 °c to 700 °c, thermal weight analysis (TGA) was performed using the SETARAM analyzer (France) to determine the amount of py in the sample.
The morphology and electrical properties of the samples were studied using JEOL 7500 field emission scanning electron microscopy (SEM) and JEOL energy dispersion spectrum (EDS) systems.
Transmission electron microscopy (TEM) was performed on JEOL2011 analytical instrument ).
The Raman properties of the samples were studied using a jobin yvon HR800 co-focal Raman system with 632.
At room temperature, 8 nm laser diode excitation is performed on a 300 kWh line/mm grating.
Electrode preparation using 80 wt.
% Active materials, 10 wt.
% Of carbon black, and 10 wt.
% CMC sodium (CMC) forms a uniform slurry in distilled water.
The slurry is dispersed on copper foil.
The coated electrode is dried in a vacuum oven at 100 °c for 24 hours and then compressed at a rate of 300kpa.
The electrode is assembled into a CR 2032 coin-
Type cell in Ar-
Fill the glove box, use lithium metal as the reverse electrode, and use 1 m LiPF in ethylene carbonate/bicarbonate (EC/DMC, Volume 1/1) as the electrolyte.
Cells circulate between 1. 50u2005V and 0.
The constant current density of 01 v is 320ma ma g (0.
2 u2005 c) on the land battery tester at 25 °c
Different current rates, from 1616ma g (0.
1 u2005 C) 6400 u2005 mA g (collection.
0 u2005 C), also used to measure the electro-chemical response.
AC impedance spectroscopy (EIS) and cyclic KVA tests were performed using a biological VMP3 electrode workstation.