Abstract:
The present invention relates to a redox flow battery, and more particularly, provides a redox flow battery including: a stack in which positive electrode cells, separators, and negative electrode cells are repeatedly stacked from bipolar plates, and a bipolar plate, a collector, and an end plate are sequentially disposed on an outer side of each of the outermost positive electrode cell and the outermost negative electrode cell; a positive electrode electrolyte tank that stores positive electrode electrolyte to be supplied to the positive electrode cells; and a negative electrode electrolyte tank that stores negative electrode electrolyte to be supplied to the negative electrode cells. The positive and negative electrode electrolyte tanks include: an outflow pipe arrangement for transferring electrolyte to the stack; an inflow pipe arrangement for receiving the electrolyte from the stack; and an electrolyte injection hole for injecting electrolyte, introduced into the positive and negative electrode electrolyte tanks, to the inside of the redox flow battery. Thus, electrolyte after redox is uniformly injected into an electrolyte tank is thus efficiently mixed with electrolyte remaining the electrolyte tank and is then returned to a stack, to prevent charging capacity and energy efficiency from being reduced by overvoltage, thereby improving a battery performance.
Abstract:
본 발명은 카바이드 유도 탄소 기반 음극 활물질 제조방법에 관한 것으로, 카바이드 유도 탄소를 제조하는 단계; 및 상기 카바이드 유도 탄소의 기공을 확장하는 단계를 포함한다. 이때, 기공을 확장하는 단계는 제조된 카바이드 유도 탄소를 공기 중에서 가열하는 활성화 공정으로 수행되는 것이 좋다. 본 발명은, 제조 단계에서 활성화 공정을 부가함으로써, 카바이드 유도 탄소 내에 형성된 기공을 확장할 수 있는 효과가 있다. 또한, 기공이 확장된 카바이드 유도 탄소를 음극활물질로 적용함으로써 충방전 효율이 향상된 리튬 이차전지를 제조할 수 있는 효과가 있다.
Abstract:
The present invention relates to a redox flow battery and an operating method, and according to the present invention, a catholyte tank and an anolyte tank are located higher than the position on which a stack is placed; a part of an electrolyte inside the stack is collected to be stored in an electrolyte tank, thereby preventing a countercurrent and self-discharge of the electrolyte during non-operation; and especially, nitrogen is flowed into the redox flow battery to prevent a drying phenomenon of a separation membrane induced by electrolyte insufficiency, thereby obtaining the effect of preventing a decrease in durability of the redox flow battery.
Abstract:
The present invention relates to a stack structure of an electrochemical flow cell and a redox flow battery including the same and, more specifically, to a a stack structure of an electrochemical flow cell and a redox flow battery including a frame which includes an instrument for both connecting and disconnecting and a manifold complex built up with a plurality of manifold unit modules which includes a felt electrode ensconced on the frame. Since adjusting the surface area of voltage and current according to the number of manifold unit module is possible, a user is able to secure the power output desired for the specifications and individual split and merge is easy so that a simple modification or replacement of partial unit modules is possible.
Abstract:
PURPOSE: A manifold for redox flow batteries is provided to prevent the flow of liquid electrolyte existing in a stack or pipe when the operation of a pump is stopped, thereby inhibiting the generation of shunt current. CONSTITUTION: A manifold for redox flow batteries comprises a first electrode electrolyte inlet (140) and a first electrode electrolyte outlet (141) for flowing in and out of the first electrode electrolyte; a first electrode electrolyte reaction part (120) formed inside; a supply path (160) for supplying the first electrode electrolyte injected from the first electrode electrolyte inlet to the first electrode electrolyte reaction part; an exhaust flow path (161) for transferring and discharging the first electrode electrolyte to the first electrode electrolyte outlet; and a second electrode electrolyte inlet (150) and a second electrode electrolyte outlet (151) for transferring a second electrode electrolyte.