摘要:
Pillared particles of silicon or silicon-comprising material and a method of fabricating the same are disclosed. These particles may be used to create both a composite anode structure with a polymer binder, a conductive additive and a metal foil current collector, and an electrode structure. The structure of the particles overcomes the problems of charge/discharge capacity loss.
摘要:
An electrically interconnected mass includes elongated structures. The elongated structures are electrochemically active and at least some of the elongated structures cross over each other to provide intersections and a porous structure. The elongated structures include doped silicon.
摘要:
Pillared particles of silicon or silicon-comprising material and a method of fabricating the same are disclosed. These particles may be used to create both a composite anode structure with a polymer binder, a conductive additive and a metal foil current collector, and an electrode structure. The structure of the particles overcomes the problems of charge/discharge capacity loss.
摘要:
A method of fabricating fibres of silicon or silicon-based material comprises the steps of etching pillars on a substrate and detaching them. A battery anode can then be created by using the fibres as the active material in a composite anode electrode.
摘要:
A method of fabricating electronic, optical or magnetic devices requiring an array of large numbers of small features in which regions defining individual features of the array are formed by the steps of: (a) depositing a very thin film of a highly soluble solid onto a flat hydrophilic substrate; (b) exposing the film to solvent vapor under controlled conditions so that the film reorganizes into an array of discrete hemispherical islands on the surface; (c) depositing a film of a suitable resist material over the whole surface; (d) removing the hemispherical structures together with their coating of resist leaving a resist layer with an array of holes corresponding to the islands; and (e) subjecting the resulting structure to a suitable etching process so as to form a well at the position of each hole. The wells which are formed by this process may be used to fabricate various types of devices, including arrays of semiconductor devices, and crystalline heterostructures in which the lattice constants of the component materials are different.
摘要:
Mesoscopic magnetic field sensors which can detect weak magnetic fields (typically 0.05 Tesla) over areas as small as tens of thousands of square nanometers (e.g. 40 nm×400 nm). The combination of enhanced magneto-resistance in an inhomogeneous high mobility semiconductor, having special electrode arrangements, with the use of island lithography, enables the production of special semiconductor/metal nano-composite structures, and has made possible the fabrication of an entirely new type of magnetic field sensor which exhibits very superior magneto-resistive behavior.
摘要:
A variable transmission window comprises outer panes of glass 17 and 19 and a multi layer electrochromic device allowing variation in the optical transmission properties of the window. The device comprises a transparent electrically conductive layer 12 such as indium tin oxide, an electrochromic material 13 such as a transition metal oxide bronze, a solid electrolyte 14 which is a fast ion conductor of ions of the metal which dissolves in the electrochromic material, a second electrochromic material 15, and a second transparent electrically conductive layer 16. The electrochromic material may be MoO.sub.3 or WO.sub.3. The solid electrolyte 14 may be a Bordeaux glass of LiCl, Li.sub.2 O, B.sub.2 O.sub.3. A quantity of metal colouration atoms, for example lithium, may be transferred reversibly between the electrochromic layers 13 and 15 by applying potentials to contacts 21 and 22. A given quantity of metal coloration atoms produces a coloration of greater density in one electrochromic layer than in the other, for example by having one layer 15 thicker than the other layer 13.
摘要:
An electrochromic data recording device such as a disc including at least one electrochromic zone (4) in and as a part of an electrical cell (2, 4, 5, 6, 7) for selectively supplying and withdrawing guest atoms to and from the zone to produce an optical change in the zone, the cell being substantially inoperable at a first temperature but being operable at a temperature elevated with respect to the first temperature by virtue of the mobility of current carrying ions in a component of the cell which are appropriately temperature dependent. The device can be written on by laser heating the device locally to allow current to pass to produce a local optical effect and can be read by a laser and photodector in combination. Further, the device can be erased by being heated sufficiently to become conductive.
摘要:
An electrode and electrode assembly, for example for use as an anode in a lithium-ion rechargeable cell that uses silicon or silicon-based elements of specific dimensions and geometry as its active material, is provided, as well as methods for manufacturing the same. The active silicon or silicon-based material may include fibers, sheets, flakes, tubes or ribbons, for example.
摘要:
A process for etching silicon to form silicon pillars on the etched surfaces, includes treating silicon with an etching solution that includes 5 to 10M HF 0.01 to 0.1M Ag+ ions and 0.02 to 0.2M NO3− ions. Further, NO3− ions in the form of alkali metal, nitric acid or ammonium nitrate salt is added to maintain the concentration of nitrate ions within the above range. The etched silicon is separated from the solution. The process provides pillars, especially for use as the active anode material in lithium ion batteries. The process is advantageous because it uses an etching bath containing only a small number of ingredients whose concentration needs to be controlled and it can be less expensive to operate than previous processes.
摘要翻译:用于在蚀刻表面上蚀刻硅以形成硅柱的方法包括用蚀刻溶液处理硅,所述蚀刻溶液包括5至10M HF 0.01至0.1M Ag +离子和0.02至0.2M NO 3 - 离子。 此外,加入碱金属,硝酸或硝酸铵盐形式的NO 3 - 离子以将硝酸根离子的浓度维持在上述范围内。 蚀刻的硅与溶液分离。 该方法提供了支柱,特别用作锂离子电池中的活性阳极材料。 该方法是有利的,因为它使用仅含有少量成分的蚀刻液,其浓度需要被控制,并且可以比以前的方法操作更便宜。