Array type positive electrode current collector for liquid metal battery

Abstract

The invention discloses an array type positive electrode current collector for a liquid metal battery. By arranging a columnar array pointing to the direction of a negative electrode at the bottom ofa positive electrode current collector shell, the distribution uniformity of the positive electrode interface of the liquid metal battery is effectively improved, the internal stress of an interface alloy layer is reduced, more attachment sites are provided for the alloy layer, and the short-circuit risk in the operation process of a large-size battery is effectively eliminated, at the same time,the mass transfer process of the battery charging and discharging process can be effectively ensured, and the safe, stable and efficient battery operation is promoted.

Description

technical field

[0001] The invention belongs to the technical field of electrochemistry, and in particular relates to an array positive current collector for a liquid metal battery. Background technique

[0002] Liquid metal battery is a high-temperature secondary battery for distributed grid energy storage proposed by Professor Sadoway of MIT in 2009. Due to its advantages such as ultra-long cycle life, excellent rate performance, high Coulombic efficiency and energy efficiency, it has attracted extensive attention from the scientific research community in recent years, and it is expected to become a new generation of high-efficiency distributed grid energy storage technology.

[0003] However, the battery cell faces certain technical challenges in the process of engineering scale-up. The main reasons for the difficulty in scaling up the battery cell are as follows:

[0004] 1) The uneven distribution and growth of the solid alloy layer at the positive electrode interface ...

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