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One of the most significant limitations in current lithium ion cells comes from the slow diffusion of lithium ions within the cathode material during charge and discharge. Particles of these materials may be several or tens of micrometres in diameter requiring lithium ions to diffuse across several micrometres in order to access all of the material (capacity) present, as illustrated below.
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Nanotecture’s patented materials significantly improve the rate capability of lithium ion cells by increasing the surface area of the cathode. This is achieved by re-engineering the structure of current state-of-the-art materials in order to introduce an optimised nanostructure. The resulting nanoporous materials have significantly reduced lithium-ion diffusion distances of just a few nanometres, allowing all of the capacity of the material to be accessed in very short times. |
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Significant problems can be caused in lithium batteries by expansion of the electrodes during lithiation. This expansion can be substantially reduced through the use of Nanotecture’s materials, as most of the expansion takes place into the pores. This can have major beneficial effects to the cycle life of the battery.
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Nanotecture Ltd™. Registered in England, No. 4622794. Registered office: Epsilon House, Southampton Science Park, Southampton, Hampshire, SO16 7NS.© 2007 Nanotecture Limited™. Usage subject to terms and conditions. |
