ceramic materials for lithium ion battery applications

... Nano-sized transition-metal oxides as negative-electrode materials for lithium- ion batteries Nature 2000, 407:496 Depart A, Dupont L, Poizot P, Leriche JB, Tarascon JM: A transmission electron microscopy ... HY, Huang PX, Wu F, Song DY: Preparation and electrochemical performance of polycrystalline and single crystalline CuO nanorods as anode materials for Li ion battery J Phys Chem B 2004, 108:5547 ... [27] Formation of composites by incorporation of MWCNTs can provide an enhanced electronic conductivity of electrodes and elastic buffers for releasing the strain of CuO during the Li conversion...

Ngày tải lên: 21/06/2014, 03:20

... NANOSTRUCTURED ANODE MATERIALS FOR LITHIUM ION BATTERIES DENG DA 2009 CARBON AND TIN BASED NANOSTRUCTURED ANODE MATERIALS FOR LITHIUM ION BATTERIES DENG DA (B Eng.(Hons), NUS) A THESIS SUBMITTED FOR THE DEGREE ... aspects of the battery, e.g., materials for cathodes and anodes, electrolyte, separator, and cell construction The electrolyte for lithium ion batteries is normally a solution of lithium salts ... LixCn (1) The extraction of lithium ions is the reverse reaction of (1) The forms of carbon determine the value of n in equation (1) For instance n is equal to when lithium ions are fully incorporated...

Ngày tải lên: 12/09/2015, 09:22

... depiction of the operation of a lithium- ion battery 11 Figure 1.8 Schematic depiction of the operation of a sodium -ion battery 13 Figure 1.9 Prominent families of cathodes for lithium- ion batteries ... chapter 7, conclusions and suggestions for future research are provided Key words: lithium- ion batteries, sodium -ion batteries, anodes, conversion reaction, lithium titanate, transition metal oxides ... Singapore Lithium storage by conversion reaction for high rate applications S Hariharan, C Dingyan, C L S H S.Soon, L L J Jie, K Cangming, K Saravanan and P Balaya, Lithium battery discussion, 2009,...

Ngày tải lên: 08/09/2015, 18:44

... Schematic representation of the formation of IONP@mC-600 (A) IONPs and F127 micelles, (B) resol-Fe3O4 and resol-F127 monomicelles, (C) IONP@PC, (D) IONP@mC, (E) cross section of IONP@mC, and (F) ... alternation in the overall dimension TiO2 is one of the anode materials from this category featured with fast lithium ion insertion/extraction process.[37] TiO2 also has low volume expansion upon lithium ... (A) IONP@mC-750 and (B) IONP@mC-900 TEM image of (C) IONP@mC-750 and (D) IONP@mC-900 114 Figure 6-17: Electrochemical performances of IONP@mC-600 (blue sphere), IONP@mC-450 (red diamond), IONP@mC-750...

Ngày tải lên: 10/09/2015, 09:30

... nano-Fe2 O3 performance as anode material for lithium ion batteries [24,25] Nanosize materials have large surface areas and high surface energy For lithium ion battery applications, the large ... decomposition and the reversible conversion reaction of lithium ion intercalation to form Li2 O An anodic peak is also present at about 1.75 V, corresponding to the reversible oxidation of Fe0 ... nanorods: (a) low magnification view and (b) high resolution TEM image in the lithium ion intercalation/de-intercalation processes could remarkably improve the electrochemical performance of Fe2 O3 as...

Ngày tải lên: 19/03/2014, 16:48

Ngày tải lên: 15/05/2014, 16:36

... and NiMoO4 formed solid solutions perfectly In general, most reports on the lithium reactivity of molybdates have been focused on their application as anode materials for lithium- ion batteries ... materials for lithium- ion batteries Nature 2000, 407:496 Taberna PL, Mitra S, Poizot P, Simon P, Tarascon JM: High rate capabilities Fe3O4-based Cu nano-architectured electrodes for lithium- ion battery ... Introduction Among the types of anode materials available for rechargeable lithium- ion batteries, graphite has been commercialized However, because of its drawbacks, such as capacity limitations...

Ngày tải lên: 20/06/2014, 21:20

... the ionic mobility strongly depends on the polymer segmental motion and that the cation transport number is low in the SPE at a high salt concentration Therefore, new materials with unconventional ... in the ionic conductivity because PS does not contribute to the dissociation of salts and transport of cations The transport of cations is done by ion- hopping through the ion percolation path ... distinction between free (dissociated) ions, contact ion pairs, and more aggregates may be observed in the vibrational spectra of the internal mode of anions, such as the triflate anion [Tf−] Ion...

Ngày tải lên: 20/06/2014, 23:20

... areas; hence, shorter are the Li -ion diffusion paths The reduced ion migration pathways lead to effective ion diffusion and ultimately enhance material properties/performances However, the significant ... ground well before heating at 600°C for h to eliminate undesired organic materials that remained The heated powders were ground completely and then fired at 900°C for 12 h for crystallization The resultant ... prepared by coprecipitation method In brief, the transition metal acetate precursors and lithium hydroxide were dissolved separately in distilled water The aqueous solution of lithium hydroxide was...

Ngày tải lên: 20/06/2014, 23:20

... alloying-type materials (such as SnO2, SnO) [36–44], and conversion-type materials (such as Co3O4, Fe2O3) [45] Insertion-Type Materials Among these insertion-type oxide anode materials for Li -ion batteries, ... Reproduced with permission during Li? insertion/extraction process This pulverization disadvantage is the disgusting obstacle for practical application of Si as the anode for Li -ion batteries To overcome ... cyclability in Li? storage and retrieval Conversion-Type Materials On the other hand, lithium reaction of some 3d transitionmetal oxides is a conversion reaction, similar to non-alloy metal oxides, such...

Ngày tải lên: 21/06/2014, 07:20

... areas; hence, shorter are the Li -ion diffusion paths The reduced ion migration pathways lead to effective ion diffusion and ultimately enhance material properties/performances However, the significant ... ground well before heating at 600°C for h to eliminate undesired organic materials that remained The heated powders were ground completely and then fired at 900°C for 12 h for crystallization The resultant ... prepared by coprecipitation method In brief, the transition metal acetate precursors and lithium hydroxide were dissolved separately in distilled water The aqueous solution of lithium hydroxide was...

Ngày tải lên: 21/06/2014, 17:20

... and C.W Mason, Nanostructured Mesoporous Materials for Lithium- ion Battery Applications Energy Harvesting and Storage: Materials, Devices, and Applications II Book Series: Proceedings of SPIE ... Presentation: Porous Nanostructured Li3V2(PO4)3/C for High Storage Capacity and High Rate Performance Lithium Battery International Conference on Materials for Advanced Technologies (ICMAT), Materials ... reaction; and (3) a high reversibility of electrochemical reaction In another aspect, since the storage mechanisms for current lithium- ion batteries are based on insertion/deinsertion of lithium ions...

Ngày tải lên: 09/09/2015, 10:10

... 40 ° for h; (b) addition of H3PO4 to C 2+ 3+ the (Mn , Fe ) solution under sonication, followed by more h of sonication; (c) addition of H3PO4 to the (Mn2+, Fe3+) solution under sonication for ... HowStuffWorks.com. 26 July 2014 The lithium- ion batteries required for EV applications or grid-scale electrical energy storage are much larger Cost, safety and durability considerations; ... phase transformation) to quasi-one-phase reaction to one-phase solid-solution reaction (nonequilibrium phase transformation) The switchover from a two-phase reaction to a single-phase reaction can...

Ngày tải lên: 09/09/2015, 11:07

... mechanisms: i Intercalation- based materials ii Conversion-reaction-based materials iii Alloying-reaction based materials 1.3.1.1 Intercalation based anode materials Insertion electrode materials are included ... reversible extraction/insertion of lithium ions from/into the lithium planes The lithium- ion movement between the MO2 layers provides fast two-dimensional lithium- ion diffusion, and the edge-shared ... for cathode materials for LIBs are[8]: (i) A transition metal ion in the insertion compound cathode with large work function to maximize the cell voltage, (ii) large amount of lithium insertion/extraction...

Ngày tải lên: 10/09/2015, 09:27

... Principle of operation of LIBs I.4 Applications and World market I.5 Need of R&D and selection criterion of electrode materials for LIBs I.6 Prospective second generation cathode materials for LIBs I.6.1 ... operation, development of LIBs, applications, world market and need for R&D and selection criterion of electrode materials for LIBs This is followed by the literature survey on the major battery ... cathode, anode and electrolyte materials for LIBs Motivation for the present studies on the anode materials for LIB are mentioned I.1 Definition of Battery A battery is a device, which converts the...

Ngày tải lên: 11/09/2015, 10:17

... and electrolytes for LIB The concluding section describes the motivation for the present study on the anodes for LIB 1.1 Definition of Battery A battery is a device that transforms chemical energy ... space applications [4] Such applications need high voltage (36 or 48 V) in terms of high specific power and power density LIB prototypes for such applications were checked for their performance ... and commercial lithium- ion polymer battery from SONY for mobile phone The specifications of the battery are given in Table 1.2 Table 1.2 Specifications of SONY Lithium Polymer Battery Taken from...

Ngày tải lên: 16/09/2015, 08:32

... the nickel-metal-hydride battery and the lithium ion battery Figure 1-1 (a) Construction of a Daniell cell; (b) early illustration of Daniell cells [2] 1.2 Li -ion battery Lithium is an interesting ... transition metal ions; red: Li ions) [25] For improvement, Co ions in LiCoO2 can be substituted by other transition metal ions such as Ni and Mn The new substitutions can reduce the cost of the materials ... essais denduction de ces formulations dộlectrodes ont ộtộ rộalisộs sur les lignes de production lộchelle pilote au CEA, ce qui a conduit des ộvolutions dans la composition des formulations Cette...

Ngày tải lên: 19/05/2016, 10:44

... Nernst-Einstein relationship (Eq 1.10), Li+ ion conductivity is proportional to Li+ ion diffusion coefficient Thus, in this research, Li + ion diffusion coefficient is used instead of Li+ ion conductivity ... 5.1 Conductions of Li+ ions and electrons during lithiation and delithiation processes, and the extended Cannikin Law 61 Fig 5.2 Schematic preparation processes for the LTO materials shown ... indicators for high-power applications Power density is defined as operation current density times operation voltage For an anode material, low working potential implies high operation voltage...

Ngày tải lên: 09/09/2015, 11:18

... HIGH-POWER DENSITY LITHIUM- RICH CATHODE MATERIALS FOR FUTURE LITHIUM- ION BATTERIES: EXPLORING AND UNDERSTANDING MECHANISMS AND ROLE OF TRANSFORMATION SONG BOHANG (B.Sc.) A THESIS SUBMITTED FOR THE DEGREE ... Schematic illustration of lithium- ion battery [4] Fig 1.2 Crystal structure of LiMn2O4 Green tetrahedrons indicate locations of Li ions; pink octahedrons indicate locations of Mn ions; red spheres ... be associated with spinel transformation after initial activation process involving vacancy condensation [93, 94], migration of transition metals[89, 95] and formation of spinel-domains [89, 96,...

Ngày tải lên: 10/09/2015, 09:28

... diffraction physics, aberration correction in TEM and STEM, low-loss and high-resolution electron energy-loss spectroscopy, functional materials such as optically active materials, nanomaterials ... ␮m in length A uniform functionalization with oxygen was applied to the as-provided carbon nanotubes in order to improve their dispersion and surface reactivity For this activation step the MWCNT ... chromatographic syringe Specifically, these concentrations were: 100, 200, 500 and 1000 ppb for NO2 ; 10 and 50 ppm for CO; 2, and 10 ppm for NH3 and 50 and 150 ppm for C6 H6 To assess the reproducibility...

Ngày tải lên: 20/03/2014, 13:05