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Water system energy storage battery based on (TiO)x(P2O7)y cathode and manganese-based oxide anode

A manganese-based oxide and battery technology, applied in the field of electrochemical energy, can solve the problems of low power density and energy density of titanium salt materials, little improvement in battery performance, and no substantial effect, etc. The effect of high consistency and good cycle stability

Active Publication Date: 2016-04-20
BENAN ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The power density and energy density of the titanium salt material are low, and the cycle performance is poor, and the material will slowly dissolve in aqueous solution and is unstable
In CN1326594A, a kind of titanium oxysalt is adopted as the additive of positive electrode material manganese dioxide, and preferred titanium oxysalt is TiOSO 4 , when the battery cathode contains titanium oxide salt, it mainly prolongs the service life of the battery by changing the discharge process and cathode products, which does not play a substantial role in itself, and hardly improves the performance of the battery. The liquid is an alkaline aqueous solution of sodium hydroxide, which pollutes the environment

Method used

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  • Water system energy storage battery based on (TiO)x(P2O7)y cathode and manganese-based oxide anode
  • Water system energy storage battery based on (TiO)x(P2O7)y cathode and manganese-based oxide anode
  • Water system energy storage battery based on (TiO)x(P2O7)y cathode and manganese-based oxide anode

Examples

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preparation example Construction

[0024] Preparation and M of the positive / negative pole of the present invention x mn y o z -((TiO) x (P 2 o 7 ) y The assembly steps of the system full battery are as follows:

[0025] (1) M x mn y o z Preparation of positive electrode

[0026] with M 2 CO 3 with MnO 2 As the raw material, the M x mn y o z Cathode material. The general formula of the manganese-based alkali metal salt compound is M x mn y o z , wherein M is at least one of Li, Na, K, x:y:z=0~2.0:1.0~3.0:4.0, wherein M x mn y o z The mass in M x mn y o z The proportion in / AC is 50wt%~100wt%;

[0027] (2)((TiO) x (P 2 o 7 ) y Preparation of negative electrode

[0028] Using titanium salt and ammonium dihydrogen phosphate as raw materials, the titanyl phosphate precursor is synthesized in a hydrothermal reaction kettle according to the metering ratio, and then sintered under high temperature conditions to form a titanyl phosphate negative electrode material. The chemical formula of ...

Embodiment example 1

[0032] Implementation Case 1: LiMn 2 o 4 -(TiO) 2 P 2 o 7 System full battery assembly and its performance

[0033] Positive electrode uses LiMn 2 o 4 According to the mass ratio of active material: conductive agent: binder = 8:1:1, add solvent and mix evenly, after drying, press on the current collector; the negative electrode uses (TiO) 2 P 2 o 7 / AC((TiO) 2 P 2 o 7 : AC=(3~5):1) Materials, according to the mass ratio of active material: conductive agent: binder = 7:2:1, add solvent and mix evenly, after drying, press on the current collector; the diaphragm adopts no Spinning diaphragm, electrolyte use 1mol / LLi 2 SO 4 aqueous solution to assemble a full battery. The battery is charged and discharged in the 1.1-1.8V window, and the voltage platform is 1.5V at a rate of 0.5C, and 65mAh / g is retained after 1200 cycles. The full battery system has good cycle stability;

[0034] In this implementation case, the Li 2 SO 4 The electrolyte in aqueous solution can us...

Embodiment example 2Na0

[0035] Implementation Case 2Na 0.44 MnO 2 -(TiO) 2 P 2 o 7 System full battery assembly and its performance

[0036] Positive electrode uses Na 0.44 MnO 2 According to the mass ratio of active material: conductive agent: binder = 8:1:1, add solvent and mix evenly, after drying, press on the current collector; the negative electrode uses (TiO) 2 P 2 o 7 / AC((TiO) 2 P 2 o 7 : AC=3~5:1) material, according to the active material ((TiO) 2 P 2 o 7 The ratio to activated carbon is 4:1): conductive agent: binder = 7:2:1 mass ratio, add solvent and mix evenly, after drying, press on the current collector; the separator is made of non-woven fabric, and the electrolyte uses 1mol / LNa 2 SO 4 aqueous solution to assemble a full battery. The battery is charged and discharged in the 1.0-1.8V window, and 45mAh / g is retained after 1200 cycles at a rate of 0.5C. The full battery system has good cycle stability;

[0037] In this implementation case, the Na used 2 SO 4 The el...

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Abstract

The invention relates to a water system energy storage battery based on a (TiO)x(P2O7)y cathode and a manganese-based oxide anode. The water system energy storage battery comprises an anode plate taking manganese-based alkali metal salt as an active anode substance, and a cathode plate taking phosphoric oxotitanium as an active cathode substance, wherein electrolyte adopts an aqueous solution containing alkali metal ions. According to the water system energy storage battery, a novel phosphoric oxotitanium ((TiO)x(P2O-7)y) material is applied into the water system battery, thus constructing a novel water system energy storage battery. The system material is stable in whole structure, rich in raw material and simple in process; the cost for whole preparation is low; in the production process, no toxic substance is adopted or generated, so that the safety and the environment friendliness are greatly improved; meanwhile, the water system energy storage battery is higher in energy density and power density, is extremely good in circulating stability when applied to the field of energy storage, and can work within a wider temperature range, and each monomer can realize high consistency.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy and also belongs to the field of secondary batteries, in particular to a novel water-based energy storage battery. Background technique [0002] Over the past few decades, with the rapid economic development, the continuous consumption of fossil energy resources has become increasingly depleted, the price of energy has continued to rise, and environmental problems have become increasingly prominent. Therefore, whether clean, low-cost, high-efficiency, and renewable new energy can be developed is related to the sustainable development of human society. The comprehensive and efficient development and utilization of new energy, energy-saving technology and environmental protection technology has become a very urgent topic. Although lead-acid batteries, nickel-metal hydride batteries, lithium-ion and other secondary batteries have high energy density, they have short cycle life, poor h...

Claims

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Application Information

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IPC IPC(8): H01M4/50H01M4/58H01M4/485H01M10/054
CPCH01M4/485H01M4/50H01M4/5825H01M10/054Y02E60/10
Inventor 刘宇贺诗阳贺健张书明赵宽尚梦诗
Owner BENAN ENERGY
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