ENERGY STORAGE DEVICES COMPRISING CARBON-BASED ADDITIVES AND METHODS OF MAKING THEREOF

• Main Author: JAGANNATHAN, SUDHAKAR
• Format: Patent
• Language: English; French
• Published: 24.09.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

An energy storage device is described which includes an electrode comprising lead, an electrode comprising lead dioxide, a separator between the electrode comprising lead and the electrode comprising lead dioxide, and an aqueous electrolyte solution containing sulfuric acid. A negative active material of the energy storage device includes a first carbon-based additive having a surface area from 100 m2/g to 2000 m2/g as measured according to the BET method, the first carbon-based additive comprising both microporous pore widths less than 2 nanometers and mesoporous pore widths between 2 and 50 nanometers, and a second carbon-based additive having a surface area from 3 m2/g to 50 m2/g as measured according to the BET method. La présente invention concerne des dispositifs de stockage d'énergie tels que des batteries d'accumulateurs au plomb et des procédés permettant d'améliorer leur rendement par ajout d'un ou de plusieurs additifs à base de carbone.