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A kind of modification method of Prussian blue compound of positive electrode material of sodium ion battery

A sodium-ion battery and Prussian blue technology, applied in the field of energy materials, can solve the problems of poor cycle stability and low utilization of active materials, and achieve the effects of increasing cycle life, enhancing chemical stability, and increasing porosity

Active Publication Date: 2020-11-13
湖州超钠新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problems of poor cycle stability and low utilization rate of active materials in the prior art, the positive electrode material of Prussian blue-type sodium-ion batteries, the present invention intends to provide a modification method of Prussian blue-type compounds for positive electrode materials of sodium-ion batteries, so as to improve the Prussian blue Cycling stability and active material utilization of sodium ion-like cathode materials

Method used

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  • A kind of modification method of Prussian blue compound of positive electrode material of sodium ion battery
  • A kind of modification method of Prussian blue compound of positive electrode material of sodium ion battery
  • A kind of modification method of Prussian blue compound of positive electrode material of sodium ion battery

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Embodiment 1

[0018] Take a certain amount of Prussian blue material Na 2 NiFe(CN) 6 ·H 2 O is placed in the constant temperature zone of the tube furnace, heated to 100°C, and kept warm during the treatment. At the same time, argon gas was introduced through the gas control system, and the pressure in the tube was kept at 50Pa. Turn on the plasma generator, adjust its power to 300W, and process for 10 minutes. Obtain plasma-modified Prussian blue-like sodium-ion battery cathode material Na 2 Ni[Fe(CN) 6 ]·H 2 O.

Embodiment 2

[0020] Take a certain amount of Prussian blue material Na 2 FeFe(CN) 6 ·3H 2 O is placed in the constant temperature zone of the tube furnace, heated to 200°C, and kept warm during the treatment. At the same time, nitrogen gas was introduced through the gas control system, and the pressure in the tube was maintained at 100 Pa. Turn on the plasma generator, adjust its power to 100W, and process for 30 minutes. Obtain plasma-modified Prussian blue-like sodium-ion battery cathode material Na 2 Fe[Fe(CN) 6 ]·3H 2 O.

Embodiment 3

[0022] Take a certain amount of Prussian blue material Na 2 MnFe(CN) 6 Place in the constant temperature zone of the tube furnace to maintain room temperature. At the same time, oxygen is introduced through the gas control system, and the pressure in the tube is kept at 1Pa. Turn on the plasma generating device, adjust its power to 50W, and process for 1min. Obtain plasma-modified Prussian blue-like sodium-ion battery cathode material Na 2 Mn[Fe(CN) 6 ].

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Abstract

The invention discloses a plasma modification method for a sodium ion battery positive electrode material Prussian blue analog. The method comprises the following steps: placing the sodium ion batterypositive electrode material Prussian blue analog in a plasma generator, performing plasma bombardment treatment for a period of time, and keeping the temperature at room temperature or heating the plasma generator during treatment in order to obtain a plasma modified sodium ion battery positive electrode material Prussian blue analog. The method improves the porosity and the surface stability ofthe above material in order to improve the actual specific capacity and the cycle stability of the material. The method has the advantages of simple process, high controllability, low cost, and easiness in industrial production.

Description

technical field [0001] The invention relates to a method for modifying a Prussian blue compound, a cathode material of a sodium ion battery, and belongs to the field of energy materials. Background technique [0002] Clean energy, such as solar energy, wind energy, water energy, and tidal energy, is gradually replacing traditional fossil energy that is increasingly depleted. Restricted by geography and weather, most renewable energy sources are unstable, discontinuous and uncontrollable. In order to meet the stability of energy output, it is imperative to develop new energy storage devices. Commercial lithium-ion batteries have been successfully used in portable electronic devices and electric vehicles since their invention in the 1990s. However, with the increasing usage of lithium-ion batteries, as a rare metal, the problem of lithium's reserves and distribution has emerged. This greatly limits the further development of lithium batteries, especially in the field of lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/054
CPCH01M4/58H01M10/054Y02E60/10
Inventor 姜银珠王宝琦王晓
Owner 湖州超钠新能源科技有限公司