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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  • Claims
  • Application Information

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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

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

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Example Embodiment

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

[0025] (1)M x Mn y O z Preparation of positive electrode

[0026] Take M 2 CO 3 With MnO 2 As raw material, M is synthesized by solid phase method according to a certain metering ratio 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 , Where M is at least one of Li, Na, K, x:y:z=0~2.0:1.0~3.0:4.0, where M x Mn y O z The quality is in M x Mn y O z The ratio in / AC is 50wt% to 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 reactor according to the metering ratio, and then sintered to synthesize the titanyl phosphate anode material under high temperature conditions. Th...

Example Embodiment

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

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

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

Example Embodiment

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

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

[0037] In this case, the Na used 2 SO 4 The electrolyte in the aq...

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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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