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Batteries comprising alkali-transition metal phosphates and preferred electrolytes

一种电解质、电池的技术，应用在电池电极、二次电池、电路等方向，能够解决充电容量不足、失去再充电的能力、无法经济地生产等问题

Inactive Publication Date: 2005-08-03
VALENCE TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many cathode materials known in the art lack one or more of these properties
As a result, for example, many of these materials cannot be economically produced, provide insufficient voltage, have insufficient charge capacity, or lose the ability to recharge after many cycles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0205] Molecular formula is Li 1.025 co 0.9 al 0.025 Mg 0.05 PO 4 The electrode active materials were fabricated as follows. Sources of Li, Co, Al, Mg and phosphate were provided which contained the respective constituents in a molar ratio of 1.025:0.9:0.025:0.05:1.

[0206] 0.05125 mol Li 2 CO 3 (mol.wt.73.88g / mol) 3.8g

[0207] 0.03 mol Co 3 o 4 (240.8g / mol) 7.2g

[0208] 0.0025 mol Al(OH) 3 (78g / mol) 0.195g

[0209] 0.005 mole Mg(OH) 2 (58g / mol) 0.29g

[0210] 0.1 mole (NH 4 ) 2 HPO 4 (132g / mol) 13.2g

[0211] 0.2 mole of elemental carbon (12g / mol) (>100% excess) 2.4g

[0212] The aforementioned starting materials were mixed and ball milled to mix the fine particles. Subsequently, the particulate mixture is granulated. The granular mixture was heated in a furnace at 750° C. for 4-20 hours in an argon atmosphere. The sample was removed from the furnace and allowed to cool. X-ray diffraction patterns show that the material has an olivine-type crystal str...

Embodiment 2

[0214] Molecular formula is Li 1.025 co 0.85 Fe 0.05 al 0.025 Mg 0.05 PO 4 (LiCo 0.85 Fe 0.05 al 0.025 Mg 0.05 Li 0.025 PO 4 ) electrode active material is produced as follows. The following sources of Li, Co, Fe, Al, Mg and phosphate were provided, which contained the corresponding components in a molar ratio of 1.025:0.85:0.05:0.025:0.05:1.

[0215] 0.05125 mol Li 2 CO 3 (mol.wt.73.88g / mol) 3.8g

[0216] 0.02833 mol Co 3 o 4 (240.8g / mol) 6.82g

[0217] 0.0025 mol Fe 2 o 3 (159.7g / mol) 0.4g

[0218] 0.0025 mol Al(OH) 3 (78g / mol) 0.195g

[0219] 0.005 mole Mg(OH) 2 (58g / mol) 0.29g

[0220] 0.1 mole (NH 4 ) 2 HPO 4 (132g / mol) 13.2g

[0221] 0.2 mole of elemental carbon (12g / mol) (>100% excess) 2.4g

[0222] The aforementioned starting materials were mixed and ball milled to mix the fine particles. Subsequently, the particulate mixture is granulated. The granular mixture was heated in a furnace at 750° C. for 4-20 hours in an argon atmosphere. The ...

Embodiment 3

[0224] Molecular formula Li 1.025 co 0.8 Fe 0.1 al 0.025 Mg 0.05 PO 4 (LiCo 0.8 Fe 0.1 al 0.025 Mg 0.05 Li 0.025 PO 4 ) electrode active material is produced as follows. The following sources of Li, Co, Fe, Al, Mg, and phosphate were provided, containing the corresponding components in a molar ratio of 1.025:0.85:0.1:0.025:0.05:1.

[0225] 0.05125 mol Li 2 CO 3 (mol.wt.73.88g / mol) 3.8g

[0226] 0.02667 mol Co 3 o 4(240.8g / mol) 6.42g

[0227] 0.005 mol Fe 2 o 3 (159.7g / mol) 0.8g

[0228] 0.0025 mol Al(OH) 3 (78g / mol) 0.195g

[0229] 0.005 mole Mg(OH) 2 (58g / mol) 0.29g

[0230] 0.1 mole (NH 4 ) 2 HPO 4 (132g / mol) 13.2g

[0231] 0.2 mole of elemental carbon (12g / mol) (>100% excess) 2.4g

[0232] The aforementioned starting materials were mixed and ball milled to mix the fine particles. Subsequently, the particulate mixture is granulated. The granular mixture was heated in a furnace at 750° C. for 4-20 hours in an argon atmosphere. The sample was rem...

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Abstract

Lithium batteries comprising: (a) an electrode comprising a material of the formula AaMb(XY4)cZd, wherein (i) A is an alkaline metal and 0 < a <= 9; (ii) M comprises a transition metal, and 1 <= B <= 3; (III) XY4 is X'O4-XY'X, X'O4-y,Y''2y, X'S4, or mixtures thereof, where X' is P, As, Sb, Si, Ge, V, S, or mixtures thereof; X' is P, As, Sb, Si, Ge, V, or mixtures thereof; Y' is halogen, S, N, or mixtures thereof; 0 <= x < 3; and 0 < y <= 2; and 0 < x <= 3; and (iv) Z is OH, halogen, or mixtures thereof, and 0 <= d <= 6; and (b) a counter-electrode; and (c) an electrolyte comprising an alkyl and / or alkylene carbonate and a cyclic ester. Preferably, M additionally comprises at least one non-transition metal. Preferred embodiments include those having an olivine structure, where c = 1, and those having a NASICON structure, where c=3.

Description

technical field [0001] The present invention relates to batteries. In particular, the invention relates to batteries comprising: an active material comprising lithium or other alkali metals, transition metals, and phosphates or similar moieties; and an electrolyte comprising alkylene carbonate and cyclic ester. Background technique [0002] A wide variety of electrochemical cells or "batteries" are known in the art. Generally speaking, a battery is a device that converts chemical energy into electrical energy through an electrochemical redox reaction. Batteries are used in a wide variety of applications, especially as a power source for devices that cannot be practically powered by centralized power sources such as commercial power plants utilizing public transmission lines. [0003] A battery can generally be described as comprising three components: the anode, which contains material that is oxidized (generates electrons) during battery discharge (i.e., while supplying ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/136H01M4/56H01M4/58H01M4/62H01M10/0525H01M10/0568H01M10/0569H01M10/36
CPCH01M10/0569H01M4/0471H01M4/136H01M4/56H01M4/5815H01M4/582H01M4/5825H01M4/622H01M4/623H01M4/624H01M4/625H01M10/0525H01M10/0568H01M2004/027Y02E60/122Y02E60/10H01M4/58H01M4/48
Inventor 詹姆斯·皮尤M·耶齐德·赛义迪海涛·黄
Owner VALENCE TECH INC
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