NEGATIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY, CONDUCTIVE COMPOSITION FOR SECONDARY BATTERY, NEGATIVE ELECTRODE MATERIAL COMPRISING SAME, NEGATIVE ELECTRODE STRUCTURE AND SECONDARY BATTERY COMPRISING SAME, AND METHOD FOR MANUFACTURING SAME

• Main Authors: KAWAKAMI, Soichiro, JUNG, Hyun Ju, CHANG, DongGyu, LEE, Ju Myeung
• Format: Patent
• Language: English; French; German
• Published: 21.02.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention relates to a negative electrode active material for a secondary battery, a conductive composition for a secondary battery, a negative electrode material including the same, a negative electrode structure and secondary battery including the same, and a method for manufacturing the same. The present invention includes: a silicon particle; and an amorphous surface layer formed on the surface of the silicon particle. According to the present invention, the negative electrode structure is formed of a composite of a silicon particle and carbon or lithium ion, the oxygen contents of the solid electrolyte and silicon particles are low, and thus aggregation of silicon particles is inhibited. Therefore, in the event of using the negative electrode structure in a negative electrode, a power storage device such as a lithium secondary battery may have high energy density, high output density, and a longer charging/discharging life cycle.