• Title/Summary/Keyword: Li-ion secondary battery

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Characteristics of LiMn2O4 Cathode Material Prepared by Precipitation-Evaporation Method for Li-ion Secondary Battery (침전-증발법에 의해 제조된 리튬이온 2차 전지용 LiMn2O4 양극재료의 특성)

  • Kim, Guk-Tae;Yoon, Duck-Ki;Shim, Young-Jae
    • Korean Journal of Materials Research
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    • v.12 no.9
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    • pp.712-717
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    • 2002
  • New wet chemical method so called precipitation-evaporation method was suggested for preparing spinel structure lithium manganese oxide ($LiMn_2$$O_4$) for Li ion secondary battery. Using precipitation-evaporation method, $LiMn_2$$O_4$ cathode materials suitable for Li ion secondary batteries can be synthesized. Single spinel phase $LiMn_2$$O_4$ powder was synthesized at lower temperature compared to that of prepared by solid-state method. $LiMn_2$$O_4$ powder prepared by precipitation-evaporation method showed uniform, small size and well defined crystallinity particles. Li ion secondary battery using $LiMn_2$$O_4$ as cathode materials prepared by precipitation-evaporation method and calcined at $800^{\circ}C$ showed discharge capacity of 106.03mAh/g and discharge capacity of 95.60mAh/g at 10th cycle. Although Li ion secondary battery showed somewhat smaller initial capacity but good cyclic ability. It is suggested that electro-chemical properties can be improved by controlling particle characteristics by particle morphology modification during calcination and optimizing Li ion secondary battery assembly conditions.

The Prospect and Future of Li-ion Battery

  • Lee, Sung-Joon;Jeong, Seung-Hwan;You, Chung-Yeol;Soh, Dea-Wha;Hong, Sang-Jeen
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2005.07a
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    • pp.627-628
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    • 2005
  • In recent years, the rapid growth of portable electronic device market requires higher density characteristics of batteries. The speed at which portability and mobility is advancing hinges much on the battery. What is important is this energy source that engineers design handled devices around the battery, rather than the other way around. Much improvement has been made in reducing the power consumption of portable devices. Currently, the most popular secondary battery is Li-ion battery. Li-ion has won the limelight and become the most prominent battery. This paper reviews the prospect and future of the Li-ion battery.

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Charge-discharge behaviour of lithium ion secondary battery using graphitized mesophase pitch-based carbon fiber anodes (흑연화 MPCF 부극을 이용한 Li ion 2차전지의 충방전 특성)

  • Kim Sang-Pil;Park Jeong-Hu;Cho Jeong-Soo;Yun Mun-Soo;Kim Kyu-Tae
    • Journal of the Korean Electrochemical Society
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    • v.1 no.1
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    • pp.14-17
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    • 1998
  • Mesophase pitch-based carbon fibers(MPCF) have been investigated as an anode active material for lithium ion secondary battery. Graphitized MPCF gives high discharge capacity and good Ah efficiency. MPCF/Li cell shows an initial discharge capacity of 300 mAh/g and Ah efficiency above $90\%$ at a current density of 25 mA/g at $0\~1$ V. Cylindrical lithium ion secondary battery was fabricated using mixed carbon anode and $LiCoO_2$, cathode. In order to improve the cyclability of lithiun ion secondary battery, other carbons were added to the MPCF up to $10wt\%$. The cycle performance of lithium ion secondary battery using mixed carbons was superior to those using graphitized MPCF.

Characteristics of Lithium-ion(Li-ion) Batteries according to Charging and Discharging by Scenario (시나리오별 충방전에 따른 리튬이온(Li-ion) 배터리 특성)

  • Yongho Yoon
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.23 no.4
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    • pp.171-176
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    • 2023
  • In the modern society of the 21st century, portable electronic products using secondary batteries are continuously becoming lightweight and miniaturized. And along with this trend, we are active in the era of the Fourth Industrial Revolution, where we collect and share information in our daily lives using wearable electronic devices. Therefore, the role of secondary batteries that can be recharged while using small home appliances and digital devices is increasingly important. Along with this increase, secondary battery performance tests require various test methods such as characteristics, lifespan, failure diagnosis, and recycling. In addition, the construction of a battery test system to ensure the safety and proper functioning of the battery, along with guidelines and correct basic knowledge are being considered. Therefore, in this paper, we will examine the characteristics of the secondary battery Li-ion battery according to the charging and discharging scenarios directly connected to the performance of the battery.

A Study on Charge-Discharge Characteristics of Li Ion Battery with Cycling (Li Ion 전지의 충방전조건에 따른 전지특성 연구)

  • Hyung, Yoo-Eup;Moon, Seong-In
    • Proceedings of the KIEE Conference
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    • 1995.07c
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    • pp.1054-1057
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    • 1995
  • The pollution-free secondary Li ion battery has been developed recently. However due to short history of Li ion battery, the standards for characterized assessments and standardized testing methods have not been prepared and established yet. Also, the researches have not been done systematically regarding the operating methods of these new type of batteries. Such limited knowledge of new batteries emphasizes the importance of development of characterized assessment and the operating methods.

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Separators far Li-Ion Secondary Batteries (리튬이온 2차전지용 분리막)

  • Nam Sang Yong;Lee Young Moo;Lee Chang Hyun;Park Ho Bum;Rhim Ji Won;Ha Seong Yong;Kang Jong Seok
    • Membrane Journal
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    • v.14 no.4
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    • pp.263-274
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    • 2004
  • The polymeric membrane, a component of battery devices such as Li-ion battery (LIB) and Li-polymer battery (LPB), is a typical material in which the carrier mobility dominates the battery performance. In this paper, the state-of-the-art of membranes for secondary battery is described in terms of membrane properties. Several prerequisites, which are related to stability of battery devices, are discussed to design and prepare suitable polymeric membranes. In addition, physical requirements of membranes and their measurement methods are described to develop applicable polymeric membranes in membrane preparation processes.

Recent Trend of Lithium Secondary Batteries for Cellular Phones (최근 휴대폰용 배터리의 기술개발 동향)

  • Lee, H.G.;Kim, Y.J.;Cho, W.I.
    • Journal of the Korean Electrochemical Society
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    • v.10 no.1
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    • pp.31-35
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    • 2007
  • In this review article, we are going to explain the recent development of lithium secondary batteries for a cellular phone. There are three kinds of rechargeable batteries for cellular phones such as nickel-cadmium, nickel-metal hydride, and lithium ion or lithium ion polymer. The lithium secondary battery is one of the most excellent battery in the point of view of energy density. It means very small and light one among same capacity batteries is the lithium secondary battery. The market volume of lithium secondary batteries increases steeply about 15% annually. The trend of R&D is focused on novel cathode materials including $LiFePO_4$, novel anode materials such as lithium titanate, silicon, and tin, elecrolytes, and safety insurance.

Performance of Expanded Graphite as Anode Materials for High Power Li-ion Secondary Batteries

  • Park, Do-Youn;Lim, Yun-Soo;Kim, Myung-Soo
    • Carbon letters
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    • v.11 no.4
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    • pp.343-346
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    • 2010
  • The various expanded graphites (EGs) was prepared and applied as anode material for high power Li-ion secondary battery (LIB). By changing the processing conditions of EG, a series of EG with different structure were produced, showing the changed electrochemical properties. The charge-discharge test showed that the initial reversible capacity of EG anodes prepared at the suitable conditions was over 400 mAh/g and the charge capacity at 5 C-rate was 83.2 mAh/g. These values demonstrated the much improved electrochemical properties as compared with those for the graphite anode of 360 mAh/g and 19.4 mAh/g, respectively, showing the possibility of EG anode materials for high power LIB.

Synthesis of $LiCoO_2$ by solution route and its behaviour as a cathode material in lithium ion secondary battery (액상반응에 의해 합성한 $LiCoO_2$ 를 정극활물질로 이용한 Li ion 2차전지의 특성)

  • 김상필;조정수;박정후;심윤보;윤문수
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1998.06a
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    • pp.143-146
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    • 1998
  • The $LiCoO_2$ powder was synthesized at >$700^{\circ}C$, >$850^{\circ}C$ by solution route. In this paper, we investigated X-ray diffraction, and charge-discharge performance for $LiCoO_2$/Li and $LiCoO_2$/MPCF cell. The $LiCoO_2$/Li ceSl exhibited a high avmge discharge potential of 38-3% and a good cycle life performance at 5(hnA/g during chargedischarge cycling between 43-3.0V. And, the $LiCoO_2$MPCF cell showed a high average discharge voltage of 3.6-3.W and a excellent cycle life prfomam during chargedischarge cycling b&wm 4 2-2.W. As a result, the $LiCoO_2$ powdm syd-eizd by solution route is a good cathode material for lithium ion secondary battery.

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Preparation of Expanded Graphite using Perchloric Acid and It's Application as Anode Materials for High Power Li-ion Secondary Battery (과염소산을 이용한 팽창흑연의 제조 및 고출력 리튬이온전지 음극재로의 응용)

  • Park, Yul-Seok;Zheng, Hua;Kim, Myung-Soo
    • Journal of the Korean Applied Science and Technology
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    • v.28 no.1
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    • pp.85-94
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    • 2011
  • Expanded graphites were used as anode materials of high power Li-ion secondary battery. The expanded graphite was prepared by mixing the graphite with $HClO_4$ as a intercalation agents and $KMnO_4$ as a oxidizing agents. The physical and electrochemical properties of prepared expanded graphites through the variation of process variables such as contents of intercalation agent and oxidizing agent, and heat treatment temperature were analyzed for determination of optimal conditions as the anode of high power Li-ion secondary battery. After examing the electrochemical properties of expanded graphites at the different preparing conditions, the optimal conditions of expanded graphite were selected as 8 wt.% of oxidizing agent, 400 g of intercalation agent for 20 g of natural graphite, and heat treatment at $1000^{\circ}C$. The sample showed the improved charge/discharge characteristics such as 432 mAh/g of initial reversible capacity, 88% of discharge rate capability at 10 C-rate, and 24 mAh/g of charge capacity at 10 C-rate. However, the expanded graphite had the problems of potential plateaus like natural graphite and lower initial efficiency than the natural graphite.