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• W1971552237 endingPage "13" @default.
• W1971552237 startingPage "1" @default.
• W1971552237 abstract "리튬이온 배터리는 전기화학 에너지 저장 및 변환 기기에서 가장 높은 수준의 기술력을 기반으로 개발된 셀이며, 여전히 높은 에너지 밀도와 충방전 안정성이 높아서 가장 매력적인 배터리의 부류로서 평가받고 있다. 최근 급속한 대형 에너지 저장 응용시스템의 개발이 이루어지면서 기존의 그래파이트 전극을 대체하기 위한 새로운 음극물질의 개발이 요구되고 있다. 게르마늄과 실리콘은 이론적 에너지 용량이 높아서 다음 세대 리튬 배터리의 적합한 물질로 평가받고 있으며, 특히 게르마늄은 실리콘에 비해 충방전에 따른 부피변화가 상대적으로 적고, 리튬이온의 동력학 거동이 용이하며, 높은 전기전도도 특성이 있다. 본 총설에서는 우선 리튬이온 배터리의 기본 원리를 소개하고, 배터리 특성을 최대한 발휘할 수 있는 이상적인 음극 물질의 구조와 특성을 살펴보고자 한다. 다음 세대 음극물질로 고려되고 있는 게르마늄 복합체가 어떻게 현재의 리튬 배터리를 개선할 수 있을지를 논의하려고 한다. 그리고 최근 시도되고 있는 연구동향에 대한 소개를 끝으로 리튬이온 배터리의 고에너지 밀도화에 대한 참고문헌이 될 수 있기를 바란다. Lithium ion batteries (LIBs) are the state-of-the-art technology among electrochemical energy storage and conversion cells, and are still considered the most attractive class of battery in the future due to their high specific energy density, high efficiency, and long cycle life. Rapid development of power-hungry commercial electronics and large-scale energy storage applications (e.g. off-peak electrical energy storage), however, requires novel anode materials that have higher energy densities to replace conventional graphite electrodes. Germanium (Ge) and silicon (Si) are thought to be ideal prospect candidates for next generation LIB anodes due to their extremely high theoretical energy capacities. For instance, Ge offers relatively lower volume change during cycling, better Li insertion/extraction kinetics, and higher electronic conductivity than Si. In this focused review, we briefly describe the basic concepts of LIBs and then look at the characteristics of ideal anode materials that can provide greatly improved electrochemical performance, including high capacity, better cycling behavior, and rate capability. We then discuss how, in the future, Ge anode materials (Ge and Ge oxides, Ge-carbon composites, and other Ge-based composites) could increase the capacity of today's Li batteries. In recent years, considerable efforts have been made to fulfill the requirements of excellent anode materials, especially using these materials at the nanoscale. This article shall serve as a handy reference, as well as starting point, for future research related to high capacity LIB anodes, especially based on semiconductor Ge and Si." @default.
• W1971552237 created "2016-06-24" @default.
• W1971552237 creator A5011484641 @default.
• W1971552237 creator A5048581451 @default.
• W1971552237 creator A5088242939 @default.
• W1971552237 date "2014-02-10" @default.
• W1971552237 modified "2023-09-26" @default.
• W1971552237 title "High Energy Density Germanium Anodes for Next Generation Lithium Ion Batteries" @default.
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