Electrolyte of sodium ion battery, and preparation method and application of electrolyte

A sodium-ion battery, electrolyte technology, used in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc.

Active Publication Date: 2017-07-04
SHANGHAI SINOPOLY JIAHUA BATTERY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the urgent need to develop a sodium-ion battery with excellent low-temperature performance and cycle performance in the prior art, thus providing a sodium-ion battery electrolyte, its preparation method and application, the present invention The sodium-ion battery electrolyte uses cyclic sulfate ester compounds as additives for the first time and is applied to the field of sodium-ion batteries; the sodium-ion batteries prepared with the sodium-ion battery electrolyte of the present invention have excellent high-temperature storage performance, high-temperature cycle performance and Low temperature discharge rate performance

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  • Electrolyte of sodium ion battery, and preparation method and application of electrolyte
  • Electrolyte of sodium ion battery, and preparation method and application of electrolyte
  • Electrolyte of sodium ion battery, and preparation method and application of electrolyte

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Embodiment 3

[0050] Taking Example 3 as an example, the preparation process of the electrolyte solution of the sodium ion battery is as follows: the electrolyte solution of the sodium ion battery is 1mol / L NaClO 4 It is a sodium salt, a mixture of propylene carbonate (PC) and ethyl methyl carbonate (EMC) (volume ratio 1:1) is used as a non-aqueous organic solvent, and the additive consists of fluoroethylene carbonate (FEC), cyclic sulfate and Composition of unsaturated sultone compounds, wherein the cyclic sulfate is vinyl sulfate (DTD), and the unsaturated sultone is 1-propenyl-1,3-sultone (PST).

[0051] Wherein, the specific addition method of the sodium ion battery electrolyte in each embodiment and comparative example is shown in Table 1.

[0052] Table 1 Na-ion battery electrolyte addition method

[0053]

[0054]

[0055] Preparation of positive electrode sheets for sodium-ion batteries: the positive active material NaNi 1 / 3 Fe 1 / 3 mn 1 / 3 o 2 , the conductive agent acetyl...

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Abstract

The invention discloses an electrolyte of a sodium ion battery, and a preparation method and an application of the electrolyte. The electrolyte of the sodium ion battery comprises sodium salt, non-aqueous organic solvents and additives, wherein the additives are a sulphate type compound as shown in the formula I, a sultone type compound as shown in the formula II and fluoroethylene carbonate (FEC); the non-aqueous organic solvents are carbonic ester or carbonic ester and carboxylic ester; and the carbonic ester is cyclic carbonate and / or chain carbonate. According to the electrolyte of the sodium ion battery disclosed by the invention, the cyclic sulphate type compound is initially used as the additive to be applied to the field of the sodium ion battery; and the sodium ion battery prepared from the electrolyte of the sodium ion battery disclosed by the invention has excellent high-temperature storage performance, high-temperature cycling performance and low-temperature discharging rate capability.

Description

technical field [0001] The invention relates to a sodium ion battery electrolyte, its preparation method and application. Background technique [0002] In recent years, with the rapid development of electronic equipment, electric tools, and low-power electric vehicles, research on energy storage materials with high energy efficiency, abundant resources, and environmental friendliness is a necessary condition for the sustainable development of human society. In order to meet the large-scale market demand, it is far from enough to measure battery materials only by energy density, charge-discharge rate and other properties. Whether the manufacturing cost and energy consumption of batteries pollute the environment and the recycling rate of resources will also become important indicators for evaluating battery materials. Sodium is one of the most abundant elements on earth and has similar chemical properties to lithium, so it can also be used in lithium-ion battery systems. Com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/054H01M10/0567H01M10/058
CPCH01M10/054H01M10/0567H01M10/058Y02E60/10Y02P70/50
Inventor 杨馨蓉王红车海英闫小舍周广盖马紫峰
Owner SHANGHAI SINOPOLY JIAHUA BATTERY TECH
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