Titles:
POROUS SILICON-BASED CARBON COMPOSITE, METHOD FOR PREPARING SAME, AND NEGATIVE ELECTRODE ACTIVE MATERIAL COMPRISING SAME
다공성 규소계-탄소 복합체, 이의 제조방법 및 이를 포함하는 음극 활물질
Abstracts:
An embodiment of the present invention relates to a porous silicon-based carbon composite, a method for preparing same, and a negative electrode active material comprising same. The porous silicon-based carbon composite according to an embodiment comprises silicon particles capable of intercalating and deintercalating lithium, a magnesium compound, and carbon, and satisfies a molar ratio (Mg/Si) of magnesium atoms to silicon atoms present in the composite of 0.02-0.30 and a molar ratio (O/Si) of oxygen atoms to silicon atoms in the composite of 0.40-0.90. Thus, when the porous silicon-based carbon composite is applied to a negative electrode active material, initial efficiency and capacity retention as well as discharge capacity can be enhanced.
본 발명의 구현예는 다공성 규소계-탄소 복합체, 이의 제조방법 및 이를 포함하는 음극 활물질에 관한 것으로, 상기 구현예에 따른 다공성 규소계-탄소 복합체는 리튬을 흡수하고 방출할 수 있는 규소 입자, 마그네슘 화합물 및 탄소를 포함하고, 상기 복합체 내에 존재하는 규소 원자에 대한 마그네슘 원자의 몰비(Mg/Si)가 0.02 내지 0.30을 만족하고, 규소 원자에 대한 산소 원자의 몰비(O/Si)가 0.40 내지 0.90을 만족함으로써, 상기 다공성 규소계-탄소 복합체를 음극 활물질에 적용시 방전 용량은 물론, 초기 효율 및 용량 유지율을 향상시킬 수 있다.
Applicant:
DAEJOO ELECTRONIC MAT CO LTD [KR] (대주전자재료 주식회사)
Inventors:
PARK JEONG GYU [KR] (박정규)
LEE HYUN SEOK [KR] (이현석)
JEON YOUNG MIN [KR] (전영민)
OH SEUNG MIN [KR] (오성민)
PARK HEON SOO [KR] (박헌수)
LIM SUNG WOO [KR] (임성우)
LIM HYUN HEE [KR] (임현희)
LIM JONG CHAN [KR] (임종찬)
LEE JUNG HYUN [KR] (이정현)
Other family members:
KR 20220040580 A,
Pub. Date: 2022-03-31,
EPO/ Google
Titles:
METHODS OF PASSIVATION TO CONTROL OXYGEN CONTENT AND REACTIVITY OF SILICON-CARBON COMPOSITE MATERIALS
MÉTHODES DE PASSIVATION POUR CONTRÔLER LA TENEUR EN OXYGÈNE ET LA RÉACTIVITÉ DE MATÉRIAUX COMPOSITES SILICIUM-CARBONE
Abstracts:
Passivated silicon carbon composite materials and related processes are disclosed that overcome the challenges for providing amorphous nano sized silicon entrained within porous carbon. Compared to other, inferior materials and processes described in the prior art, the materials and processes disclosed herein find superior utility in various applications, including energy storage devices such as lithium ion batteries.
L'invention concerne des matériaux composites silicium-carbone passivés et des procédés associés qui surmontent les difficultés liées à la fourniture de silicium nanométrique amorphe entraîné dans du carbone poreux. Par comparaison avec d'autres procédés et matériaux de qualité inférieure décrits dans l'état actuel de la technique, les matériaux et les procédés divulgués ici trouvent une utilité supérieure dans diverses applications, y compris dans des dispositifs de stockage d'énergie tels que des batteries au lithium-ion.
Applicant:
GROUP14 TECH INC [US]
Inventors:
COSTANTINO HENRY R [US]
SAKSHAUG AVERY J [US]
DHANABALAN ABIRAMI [US]
TIMMONS CHRISTOPHER [US]
FEAVER AARON M [US]
Titles:
Method for producing lithium silicate and silicon
ケイ酸リチウムおよびケイ素の生成方法
Abstracts:
PROBLEM TO BE SOLVED: To provide a method capable of reducing the production of silicon carbide in producing lithium silicate and silicon from silicon powder, lithium carbonate powder and silicon dioxide powder. SOLUTION: In the method according to the present invention, a powder of lithium carbonate (Li2CO3) and silicon dioxide (SiO2) are used in the same system so that carbon dioxide (CO2) emission is prioritized over silicon carbide (SiC) production. ) And silicon (Si) powder to produce lithium silicate (SiLixOy) and silicon (Si). [Selection diagram] Fig. 1
