Sponge-Like Li4Ti5O12 Constructed on Graphene for High Li Electroactivities
2017 · Journal of Nanoscience and Nanotechnology
저자
Seongjun Bae, Inho Nam, Soomin Park, Young Geun Yoo, Jongseok Park, 이종민 (Jong Min Lee), Jeong Woo Han, Jongheop Yi
연구주제
Advancements in Battery Materials · Advanced Battery Technologies Research · Advanced Battery Materials and Technologies
NTIS 과학기술표준분류
가장 가까운 분류(전기/전자 > 전지 > 이차전지)가 화학·화공 범위 밖이다. 배정 근거: AI 키워드가 잡은 NTIS 과제의 분류.
AI 연구 키워드·방법
그래핀 복합체 고출력 리튬이온전지 리튬티탄산화물(LTO) 음극
키워드 (OpenAlex)
lithium titanate graphene lithium-ion battery anodes high-power lithium-ion batteries rate capability cycling stability
초록
A sponge-like Li(4)Ti(5)O(12)/graphene composite was prepared via sequential hydrothermal process and solid-state heat treatment process for the application to high-power lithium ion batteries. The as-prepared electrode showed outstanding Li electroactivities with a rapid and reversible Li insertion/ extraction of up to 10 C-rate (1.75 A/g). It delivered a discharge capacity of 174 mAh/g at 0.5 C, near the theoretical capacity of Li(4)Ti(5)O(12), with good rate capability and cyclic stability. First-principles calculations revealed the intimate interaction of the Li(4)Ti(5)O(12) and graphene, which implies that graphene functions as an ‘electron tunnel.’ Electrochemical impedance spectroscopy also proved that the graphene-hybridization and the unique structure of the Li(4)Ti(5)O(12) material significantly reduce the resistive behavior of electrodes. The 3D structured Li(4)Ti(5)O(12)/grap…
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교수 1
연구주제 1
Advancements in Battery Materials
키워드 3
리튬티탄산화물(LTO) 음극 · 고출력 리튬이온전지 · 그래핀 복합체