Method for preparing high-energy density disposable battery anode material

A technology with high energy density and positive electrode of battery, applied in the direction of primary battery electrode, battery electrode, non-aqueous electrolyte battery, etc. Effect

Inactive Publication Date: 2018-09-21
HEBEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a high energy density primary battery cathode material preparation method for the problem of high cost of lithium-carbon fluoride primary batteries

Method used

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  • Method for preparing high-energy density disposable battery anode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The first step is to prepare carbon fluoride-sulfur composite cathode material:

[0026] Weigh the carbon fluoride powder and the elemental nano-sulfur powder according to the mass ratio of 1:1, put the two into an agate mortar, and fully grind them for 30 minutes, so that the two are evenly mixed. Then move the agate mortar to the fume hood, add CS dropwise in proportion 2 solvent, then milled, after 3 drop-grinding processes, CS 2 After volatilization, until no yellow-white elemental sulfur powder is precipitated in the material (add 1mL CS for every 0.2g sulfur powder in total) 2 solution), and then put it into the polytetrafluoroethylene reactor liner (this process is carried out in an argon atmosphere glove box to ensure that the reactor liner is filled with rare gas argon), and then the reactor is transferred to a constant temperature oven, Sulfur is added by hot melting method, that is, heated at 155°C for 12 hours. After cooling to room temperature, the carbo...

Embodiment 2

[0033] Others are the same as in Example 1, except that the mass ratio of carbon fluoride powder and elemental nano-sulfur powder in the first step is 1:1.5.

[0034] Electrical performance test: Xinwei BTS-2000 is used as the test equipment, and the test is carried out at a constant room temperature (25°C). Set the constant current discharge cut-off voltage to 1.5V, and the current density to 100mA / g. It can be seen from the figure that the discharge specific capacity of the primary lithium battery prepared in the present invention can reach 833.9mAh / g, and its comparative data is a lithium-carbon fluoride primary battery that adopts the same electrolyte and battery assembly process, and its discharge specific capacity Only 663.3mAh / g. It can be seen that the carbon fluoride-sulfur primary battery prepared by the present invention has a higher discharge specific capacity within the same discharge voltage range.

Embodiment 3

[0036] Others are the same as in Example 1, except that the mass ratio of carbon fluoride powder and elemental nano-sulfur powder in the first step is 1:2. The discharge specific capacity of the obtained primary battery can reach 779.3mAh / g.

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Abstract

The invention discloses a method for preparing a high-energy density disposable battery anode material. The method comprises the following steps: grinding a fluorinated carbon powder and a single nanosulfur powder for 20-40 minutes in an agate mortar; dropping a sovlvent CS2 into the agate mortar under a ventilation condition, grinding, and terminating the grinding when no yellow-white single sulfur powder is separated from materials any longer; putting the materials into the inner container of a polytetrafluoroethylene reaction kettle in the presence of an argon atmosphere, and enabling thecomponents to react for 8-14 hours at 150-160 DEG C; finally cooling to a room temperature, so as to obtain the high-energy density disposable battery anode material. By adopting the method, a fluorinated carbon-sulfur binary anode activated material can be prepared, the characteristic of a relatively high specific capacity of sulfur is taken into play, and the fluorinated carbon self plays a roleof a carrier for immobilizing sulfur and improving conductivity. The method is simple and convenient in process, low in cost and high in industrial feasibility.

Description

technical field [0001] The invention belongs to the technical field of preparation of anode materials for primary lithium batteries, in particular to a preparation method of carbon fluoride and elemental sulfur composite materials to improve the electrochemical performance of primary batteries. Background technique [0002] With the rapid development of the global economy and the emergence of the oil crisis, it is imperative to seek new energy materials with high efficiency and low pollution. At present, solar energy, geothermal energy, wind energy, and tidal energy utilization technology have been greatly developed, but in order to use these energy sources more conveniently, it is necessary to use high-capacity electrochemical power sources to convert other forms of energy into electrical energy for energy storage, so , the necessity of vigorously developing electrochemical energy storage technology goes without saying. Compared with the common primary battery in the marke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M4/06H01M6/14
CPCH01M4/06H01M4/362H01M4/582H01M4/62H01M6/14
Inventor 张永光孙正豪
Owner HEBEI UNIV OF TECH
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