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Anode material properties and the general preparation method
The conductivity of anode materials are generally higher, select potential as close as possible potentials can be embedded lithium-lithium Laptop Battery compounds, such as various carbon materials and metal oxides. Reversibly de-embedded embedded anode material for lithium-ion requires:
1) In the lithium-ion intercalation reaction in the free energy change is small;
2) lithium-ion solid-state structures in the anode have a high proliferation rate;
3) highly reversible intercalation reaction;
4) have a good electrical conductivity;
5) The thermodynamic stability, while not react with the electrolyte.
Research focused on carbon materials and has a special structure of other metal oxides. Graphite, soft carbon, medium-carbon microspheres have been in the country there are development and research, hard carbon, carbon nanotubes, buckyballs C60 and other carbon materials is being studied in [18] [19] [20] [21] [22] [23]. Japan's Honda Researchand Development Co. , Ltd, K. Sato and other people use poly p-phenylene vinylene (Polyparaphenylene - PPP) of thermal ThinkPad X60 decomposition products PPP-700 (to a certain heating rate heating PPP to 700 ℃, and the heat some time to be a product of the pyrolysis) as a negative, the reversible capacity of up to 680mA · h / g. U.S. MIT, MJMatthews reports PPP-700 lithium storage capacity (Storagecapacity) up to 1170mA · h / g. If the lithium storage capacity of 1170mA · h / g, with an increase in the amount of lithium insertion, thereby improving lithium-ion battery performance, I believe that future research will focus on the smaller nano-scale micro-structure of lithium intercalation. Study of carbon anode is almost the same time, looking for potential and Li + / Li potential similar to other anode material has been taken seriously. Lithium-ion batteries used in the carbon materials surviving in two aspects:
1) Voltage lags, that is, lithium intercalation reaction in between 0 ~ 0.25V (relative to Li + / Li) and the de-embedded response occurred at about in the 1V;
2) Cycle the capacity decreased gradually, generally after 12 to 20 cycles, the capacity dropped to 400 ~ 500mA · h / g.
Theory also relies on the further deepening of a variety of high-purity, structural regularity of raw materials and carbon materials Preparation and Characterization of a more effective method of building. Fuji has developed a new type of lithium-ion battery anode materials for tin-based composite oxide, in addition to the existing research has focused on a number of metal oxides, the mass ratio of FRU 92P1167 energy than the carbon anode materials increased substantially. Such as SnO2, WO2, MoO2, VO2, TiO2, LixFe2O3, Li4Ti5O12, Li4Mn5O12, etc. [24], but not as sophisticated carbon electrode. Lithium in carbon materials, reversible high-storage mechanism in the main formation mechanism of lithium Li2 molecule, multi-layered lithium mechanism, mechanism of crystal lattice, elastic ball - elastic net model, layer - side-side - the surface of lithium storage mechanism of nano-graphite reservoir Li-ion mechanism, carbon - lithium - lithium hydrogen storage mechanism and the mechanism of pore. Graphite, as a kind of carbon materials, has long been found that it formed with the lithium-graphite intercalation compound (Graphite Intercalation Compounds) LiC6, but these theories is still in development stage. To overcome the difficulties of anode materials is also a question of capacity loop attenuation, but in literature we can see that preparation of high purity and regularity ThinkPad Z60t of the micro-structure of carbon anode materials is the development of a direction.
Preparation of anode materials for the general method can be summarized as follows.

1) In a certain high temperature heating of soft carbon highly graphitized carbon; embedded lithium-ion graphite compound formula is LiC6, in which the lithium ions in graphite the process of embedding and de-embedding dynamic changes of the graphite structure and electrochemical properties of the relationship between Irreversible capacity loss of the causes and improve the way such issues have been a number of researchers have explored. 2) will have a special structure, cross-linking resin under high temperature decomposition of the hard carbon, graphite reversible capacitance than high, its structure influenced by the raw materials, but the general literature that these carbon nano-pore structure of its embedding Lithium capacity will have significant impact on their studies have focused primarily on the use of a special molecular ThinkPad Z61t structure of the polymer to prepare with more of hard nano-porous carbon [25] [26] [27].
3) High temperature thermal decomposition of organic compounds and polymers prepared by hydrogen-carbon [28] [29]. Such materials have 600 ~ 900mA · h / g reversible electric capacity, and thus have attracted attention, but its voltage drop lag and recycling capacity is at issue is the biggest obstacle to application. An improved method for its preparation and theories to explain the mechanism will be the focus of the study.
4) All kinds of metal oxide and its mechanism is similar with the cathode material [24],
Has also been the attention of researchers to study the main aim is to obtain a new structure or composite structure of metal oxides.
5) as a lithium intercalation material, 40Y6793 carbon nanotubes, buckyballs, etc. C60 is also the current research, a new hot spot has become a branch of nano-materials research. Carbon nanotubes, the special structure of C60 buckyballs make it into a high-capacitance materials, the best choice for lithium insertion [22] [23] [30]. In theory, the availability of embedded nano-structured lithium capacity than currently available materials must be high, the micro-structure has been studied extensively and have made great progress, but how to prepare an appropriate way to achieve excellent stacking performance electrode material, this should be an important direction of research [31] [32] [33].
3 Conclusion
To sum up, in recent years, lithium-ion battery cathode active materials Chiang Kai-shek research and development and application, is very active in the international arena, and has made great progress. The crystal structure of structured materials, charge-discharge process of irreversible changes in the structure does not occur is to obtain a high specific capacity, long cycle life of lithium-ion batteries key. However, lithium intercalation materials, structure and properties of the field is still currently the weakest link. Lithium-ion battery research is a kind of continuously updated battery system, a lot of physics FRU 92P1125 and chemistry of new lithium-ion battery research will have a major impact, such as nano-solid electrodes, it is possible to make lithium-ion batteries have higher energy density and power density, thereby greatly increasing the lithium-ion battery applications. In short, lithium-ion battery research is a matter of chemistry, physics, materials, energy, electronics and many other disciplines, cross-cutting areas. The current progress in this area has given rise to the power sector and the chemical industry with great interest. Can be expected, as the relationship between structure and properties of electrode materials in-depth study, from the molecular level, designed for a variety of structured doping composite structure or the structure of positive and negative materials will be a strong impetus to lithium-ion battery research and applications. Lithium-ion batteries will be following the nickel-cadmium, nickel-metal hydride batteries, after a fairly long period of time in the future, the market prospects for the best and the fastest growing of a secondary FRU 92P1121 battery.