Construction method of mixed type drainage lithium ion battery system based on lithium cobalt oxide and activated carbon

Abstract

The invention discloses a construction method of a mixed type drainage lithium ion battery system based on lithium cobalt oxide and activated carbon. The construction method comprises the following steps: S1, configuring electrolyte; S2, activating positive electrode and negative electrode; S3, determining the LiCoO2 specific capacity; S4, determining the activated carbon specific capacity; S5, determining the positive material load and the negative material load; and S6, constructing a battery system. The construction method disclosed by the invention has the advantages that the acquired electrolyte greatly improves the stability of the negative electrode in comparison with the conventional drainage lithium ion battery, and the cyclic performance of the prepared battery is greatly improved from the whole; the capacitive character AC of the battery constructed by adopting the method greatly improves the rate capability of the negative electrode, and the entire rate capability of the battery is only from the LiCoO2, but not depends on the dual function of the positive electrode and the negative electrode as the existing drainage lithium ion battery, thereby conveniently analyzing the performance of the battery at later period; the cyclicity of the LiCoO2 is improved in the construction method processed, the possibility of producing the residual current since the AC generates theH2 by decomposing the water at the negative electrode is reduced, and the self discharge rate of the system is reduced.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for constructing a hybrid aqueous lithium-ion battery system based on lithium cobalt oxide and activated carbon. Background technique [0002] Since J.R.Dahn's research team first tried to apply aqueous solutions to ion batteries in the 1990s and achieved success, considering sustainable development factors such as environmental protection and economic benefits, research on aqueous lithium-ion batteries is gradually gaining attention. [0003] Aqueous lithium-ion batteries use aqueous solution as the electrolyte, which has enhanced flame retardancy, making the battery less prone to heat and heat during use, and its safety performance has been greatly improved. In addition, the aqueous solution has a wide range of sources and its ionic conductivity is much higher than that of the organic solution system at an order of magnitude level. Compared with the existing battery...

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Problems solved by technology

The average voltage of nickel-cadmium and nickel-metal hydride batteries is 1.2V, which has a memory effect that cannot be ignored, which will cause inconvenience in use and often cause premature failure of the battery; lithium-ion and iron-lithium batteries are both traditional lithium-ion batteries, which exclude structural And the difference in the system, both use organic solvents as the main electrolyte carrier, LiPF6 and other non-aqueous oxygen stable lithium salts as the lithium source of the electrolyte, this type of organic electrolyte usually has to withstand a chemical reaction voltage of more than 3V, However, charged electrodes are easy to react with highly flammable ester solvents and cause fire, which restricts their wide application in large-scale energy storage systems; in addition, the corresponding lithium salts are also very expensive, and the battery manufacturing environment must be strictly controlled at a low temperature. The water oxygen level makes the cost of traditional lithium-ion batteries generally high; the lead-acid battery is composed of six 2V sub-parts in series, and although it has the largest capacity, it has the largest volume

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