• Title/Summary/Keyword: Lithium ion secondary battery

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Research Review of Sodium and Sodium Ion Battery (나트륨을 활용한 이차전지 연구동향)

  • Ryu, Cheol-Hwi;Kang, Seong-Gu;Kim, Jin-Bae;Hwang, Gab-Jin
    • Journal of Hydrogen and New Energy
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    • v.26 no.1
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    • pp.54-63
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    • 2015
  • The secondary battery using sodium is investigating as one of power storage system and power in electric vehicles. The secondary battery using sodium as a sodium battery and sodium ion battery had merits such as a abundant resources, high energy density and safety. Sodium battery (sodium molten salt battery) is operated at lower temperature ($100^{\circ}C$) compared to NAS and ZEBRA battery ($300{\sim}350^{\circ}C$). Sodium ion battery is investigating as one of the post lithium ion battery. In this paper, it is explained for the principle and recent research trends in sodium molten salt and sodium ion battery.

Current Collectors for Flexible Lithium Ion Batteries: A Review of Materials

  • Kim, Sang Woo;Cho, Kuk Young
    • Journal of Electrochemical Science and Technology
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    • v.6 no.1
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    • pp.1-6
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    • 2015
  • With increasing interest in flexible electronic devices and wearable appliances, flexible lithium ion batteries are the most attractive candidates for flexible energy sources. During the last decade, many different kinds of flexible batteries have been reported. Although research of flexible lithium ion batteries is in its earlier stages, we have found that developing components that satisfy performance conditions under external deformation stress is a critical key to the success of flexible energy sources. Among the major components of the lithium ion battery, electrodes, which are connected to the current collectors, are gaining the most attention owing to their rigid and brittle character. In this mini review, we discuss candidate materials for current collectors and the previous strategies implemented for flexible electrode fabrication.

Performance of the Negative Carbon Electrode Prepared with Graphitic Carbon and Nongraphitic Carbon Material in Lithium Ion Secondary Battery (흑연계 및 비흑연계 탄소로 조합된 리튬이온 이차전지의 탄소부극 특성)

  • Kim, Hyun-Joong;Lee, Chul-Tae
    • Applied Chemistry for Engineering
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    • v.9 no.7
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    • pp.1065-1069
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    • 1998
  • This study was investigated to improve peformance of carbon negative electrode for lithium ion secondary battery. The carbon electrode was prepared by mixing with graphitic carbon material, natural graphite, and nongraphitic carbon material, petroleum cokes, which was heat-treated at $700^{\circ}C$ for l hour. Its electrochemical and charge-discharge characteristics were tested according to mixing ratio of different two types of carbon material. The carbon electrode prepared with various mixing ratio showed both charateristcs of two different types of carbon materials and the best characteristics as carbon electrode was demonstrated at mixing ratio of 1:1.

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Performance of Graphite Electrode Modified with Acid Treatment for Lithium Ion Secondary Battery (산처리에 의해 개질된 리튬이온 이차전지용 흑연 전극의 특성)

  • Kim, Myung-Soo;Moon, Seung-Hwan;Kim, Mun-Geol;Kim, Taek-Rae;Hahm, Hyun-Sik;Park, Hong-Soo
    • Journal of the Korean Applied Science and Technology
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    • v.22 no.2
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    • pp.142-150
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    • 2005
  • The natural graphite particles A and heat-treated graphite particles B at $1800\;^{\circ}C$ after pitch-coating were used as the anode base materials for lithium ion secondary battery. In order to improve the performance of anode materials, the base anode materials were treated with various acids. With the acid treatments of 62% $HNO_3$ and 95% $H_2SO_4$ aqueous solution, the specific surface area and electrical conductivity of base anode materials were increased, and the initial charge-discharge capacity and cycle performance were improved due to the elimination of structural defects.

Performance of modified graphite as anode material for lithium-ion secondary battery

  • Zheng, Hua;Kim, Myung-Soo
    • Carbon letters
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    • v.12 no.4
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    • pp.243-248
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    • 2011
  • Two different types of graphite, such as flake graphite (FG) and spherical graphite (SG), were used as anode materials for a lithium-ion secondary battery in order to investigate their electrochemical performance. The FG particles were prepared by pulverizing natural graphite with a planetary mill. The SG particles were treated by immersing them in acid solutions or mixing them with various carbon additives. With a longer milling time, the particle size of the FG decreased. Since smaller particles allow more exposure of the edge planes toward the electrolyte, it could be possible for the FG anodes with longer milling time to deliver high reversible capacity; however, their initial efficiency was found to have decreased. The initial efficiency of SG anodes with acid treatments was about 90%, showing an over 20% higher value than that of FG anodes. With acid treatment, the discharge rate capability and the initial efficiency improved slightly. The electrochemical properties of the SG anodes improved slightly with carbon additives such as acetylene black (AB), Super P, Ketjen black, and carbon nanotubes. Furthermore, the cyclability was much improved due to the effect of the conductive bridge made by carbon additives such as AB and Super P.

Preparation and Characterization of Sulfonated Poly (Arylene Ether Sulfone) Random Copolymer-Polyolefin Pore-filling Separators with Metal Ion Trap Capability for Li-ion Secondary Battery (리튬이온 이차전지용 금속이온 선택성 술폰화 폴리아릴렌에테르술폰 공중합체-폴리올레핀 함침격리막 제조 및 특성)

  • Jeong, Yeon Tae;Ahn, Juhee;Lee, Chang Hyun
    • Membrane Journal
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    • v.26 no.4
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    • pp.310-317
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    • 2016
  • Lithium ion secondary battery (LISB) is an energy conversion system operated via charging-discharging cycle based on Lithium ion migration. LISB has a lot of advantages such as high energy density, low self-discharge rate, and a relatively high lifetime. Recently, increasing demands of electric vehicles have been encouraging the development of LISB with high capacity. Unfortunately, it causes some critical safety issues. It includes dendrite formation on negative electrode, resulting in electric shortage problems and battery explosion. Also, the elevated temperatures occurred during the LISB operation induces thermal shrinkage of polyolefin (e.g., polyethylene and polypropylene) separators. Consequently, the low thermal stability leads to decay of LISB performances and the reduction of lifetime. In this study, sulfonated poly (arylene ether sulfone) (SPAES) random copolymers were used as key materials to prepare polyolefin pore-filling separator. The resulting separators were evaluated in the term of metal ion chelation capability associated with dendrite formation, $Li^+$ ion conductivity and thermal durability.

Analysis of the Secondary Battery Charge/Discharge System Using State Space Averaging Method (상태공간평균화법에 의한 2차전지 충방전 시스템의 해석)

  • Won, Hwa-Young;Chae, Soo-Yong;Lee, Hyoung-Ju;Kim, Hee-Sun;Hong, Soon-Chan
    • Proceedings of the KIPE Conference
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    • 2008.10a
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    • pp.13-15
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    • 2008
  • Charging or discharging secondary batteries such as a lithium-ion battery is essential in the stage of production and takes long time over two hours. And the charge/discharge system is operated with high switching frequency over several tens kHz. Therefore, to simulate such a system in the conventional way takes very long time and huge files are produced. Finally, the simulation would be unable with general PC class. In this paper, the lithium-ion battery charge/discharge system is analyzed by using state space averaging method. As a result, the simulation time is reduced dramatically and the charge/- discharge characteristics of the lithium-ion battery can be observed.

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State of Health estimation based on Secondary Li-ion battery Electrochemical Modeling and Electrical experiment (리튬 이차 전지의 전기화학 모델링과 전기적 실험 기반 상태 추정)

  • Kim, Su-An;Park, Seong-Yun;Kim, Jong-hoon
    • Journal of IKEEE
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    • v.24 no.4
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    • pp.1098-1103
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    • 2020
  • This paper deals with a method for estimating the battery state-of-health(SOH) through electrical experiments and electrochemical modeling of lithium-ion secondary battery. In order to confirm the actual battery SOH through the battery electrical aging experiment, the current integration method was used. The SOH is estimated using the internal resistance value derived from the electrical experiment. Also, in electrochemical modeling, the SOH is estimated through the change of the SEI layer with the increase of the number of cycles. The new SOH is derived by applying weighting factor to the three methods of estimating SOH, including the actual battery SOH.

Preparation of Silicon-Carbon-Graphene Composites and their Application to Lithium Ion Secondary Battery (실리콘-탄소-그래핀 복합체 제조 및 리튬이온 이차전지 응용)

  • Kim, SunKyung;Kim, ChanMi;Chang, Hankwon;Jang, Hee Dong
    • Particle and aerosol research
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    • v.15 no.4
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    • pp.127-137
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    • 2019
  • Recently, high electrochemical performance anode materials for lithium ion secondary batteries are of interest. Here, we present silicon-carbon-graphene (Si-C-GR) composites for high performance anode materials of lithium ion secondary battery (LIB). Aerosol process and heat-treatment were employed to prepare the Si-C-GR composites using a colloidal mixture of silicon, glucose, and graphene oxide precursor. The effects of the size of the silicon particles in Si-C-GR composites on the material properties including the morphology and crystal structure were investigated. Silicon particles ranged from 50 nm to 1 ㎛ in average diameter were employed while concentration of silicon, graphene oxide and glucose was fixed in the aerosol precursor. Morphology of as-fabricated Si-C-GR composites was generally the shape of a crumpled paper ball and the Si particles were well wrapped in carbon and graphene. The size range of composites was about from 2.2 to 2.9 ㎛. The composites including silicon particles larger than 200 nm in size exhibited higher performance as LIB anodes such as capacity and coulombic efficiency than silicon particles less than 100 nm, which were about 1500 mAh/g at 100 cycles in capacity and 99% in coulombic efficiency, respectively.