Lithium secondary battery additive, preparation method thereof, and application thereof

A lithium secondary battery and additive technology, which is applied in secondary batteries, circuits, electrical components, etc., can solve the problems of air-stable solid electrolyte materials, etc., and achieve improved electrode ion rapid transmission, high ion conductivity, and preparation methods simple effect

Inactive Publication Date: 2019-08-16
CHINA AUTOMOTIVE BATTERY RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical compatibility of solid electrolytes with electrode materials, the air stability and solvent stability of solid electrolytes, and the preparation process of solid electrolytes make it difficult for solid electrolyte materials to be directly applied to the electrode film-forming process. middle

Method used

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  • Lithium secondary battery additive, preparation method thereof, and application thereof
  • Lithium secondary battery additive, preparation method thereof, and application thereof
  • Lithium secondary battery additive, preparation method thereof, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 glass-ceramic phase Li 3 Y 1-d In d Cl 6 Additives and their preparation

[0045] Put 30 mmoles of LiCl (1.29 g), 10-10a mmoles of InCl 3 and 10a mmol of YCl 3 After grinding, place it in a zirconia ball mill jar with a ball-to-material ratio of 30:1, and then seal the ball mill for 30 hours at a milling speed of 550 rpm. The sample obtained after ball milling is the glass-ceramic phase Li 3 Y 1-d In d Cl 6 additive. where d is 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0.

[0046] figure 1 , figure 2 The glass-ceramic phase Li that present embodiment makes respectively 3 Y 1-d In d Cl 6 (d=0.2) X-ray diffraction pattern, variable temperature ion conductivity pattern. image 3 It is the above-mentioned value of d and the change curve of the ion conductance of the corresponding product.

Embodiment 2

[0047] Embodiment 2 crystalline phase Li 3 InCl 6 Additives and their preparation

[0048] Put 30 mmol of LiCl (1.29 g), 10 mmol of InCl 3 (2.21 g) was ground and placed in a zirconia ball mill jar with a ball-to-material ratio of 20:1, followed by sealed ball milling for 20 hours at a ball milling speed of 550 rpm. The intermediate product obtained after ball milling was reacted at 450° C. for 10 hours in a sealed quartz tube. The resulting product is the crystalline phase Li 3 InCl 6 additive.

[0049] Figure 4 , Figure 5 The crystalline phase Li that this embodiment makes respectively 3 InCl 6 The X-ray diffraction pattern and the temperature-varying ion conductivity pattern.

Embodiment 3

[0050] Embodiment 3 glass phase Li 3 NbCl 8 Additives and their preparation

[0051] The preparation method is similar to Example 1, except that the raw materials used are as follows: 30 millimoles of LiCl (1.29 grams) and 2.7 grams of NbCl 5 ; The ball milling speed was changed to 450 revolutions per minute, and the ball milling time was 10 hours. Glass phase Li can be obtained after the precursor is ball milled 3 NbCl 8 additive.

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Abstract

The invention relates to the technical field of lithium secondary battery additives and particularly relates to a lithium secondary battery additive, a preparation method thereof and application thereof. The additive is LibMaXc, M is B, Al, Ga, In, Y, Sc, Sb, Bi, Nb, Ta, Ti, Zr, V, Cr, Mo, W, Mn, Tc, Re, Fe, Co, Ni, Cu, Ag, Zn, Cd, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb or Lu, X isF, Cl, Br or I, b is larger than or equal to 0.2 and smaller than or equal to 6, a is larger than or equal to 0.1 and smaller than or equal to 3, and c is larger than or equal to 1 and smaller than or equal to 9. The lithium secondary battery additive has the advantages of high ionic conductivity and air stability, the rapid transmission of electrode ions can be improved, the electrode loading capacity and thickness are improved, and the energy density of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium secondary battery additives, in particular to an additive material capable of improving the rapid transport of lithium secondary battery electrode ions, a preparation method and application thereof. Background technique [0002] Lithium secondary batteries are an ideal battery system when it comes to the energy density of batteries. However, so far, the electrochemical performance of lithium secondary batteries is still limited by the transport rate of ions and electrons in the electrode layer. In the preparation process of lithium secondary battery electrodes, the electron transport channels of the electrodes are mainly provided by adding conductive carbon and other high-electronic conductivity materials. On the other hand, the provision of the ion transport channel of the electrode is different for the organic phase lithium secondary battery and the all-solid lithium secondary battery. Due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/0567
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 孙学良李晓娜梁剑文黄欢卢世刚张立赵尚骞
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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