All statements other than statements of historical fact contained in this current report, including statements regarding the future development of QuantumScape’s battery technology, the anticipated benefits of QuantumScape’s technologies and the performance of its batteries, and plans and objectives for future operations, are forward-looking statements. This website contains forward-looking statements within the meaning of the federal securities laws and information based on management’s current expectations as of the date of this website. It took us over 10 years, over two million tests, and over $300 million to get to the level of performance we have demonstrated, so we believe this is a very hard problem and will be difficult for competitors to solve. During our development process we also created over 200 patents and applications to protect our unique approach. low power, short-cycle life, raising the temperature, etc.). To date, the principal way that these competing approaches have avoided dendrites is by compromising test conditions (i.e. Most importantly, to our knowledge none of the competing approaches have presented data showing they are able to prevent dendrites (lithium growths that short circuit batteries) at room temperature and automotive current densities. We are not aware of any of these efforts being successful on the metric of delivering long cycle life at high rates of power without requiring elevated temperatures. It is difficult to find materials that meet both these requirements and attempts to do so often result in a material that meets neither requirement well, resulting in cells that can fail from dendrite formation while also not providing sufficient conductivity to run at high power.Ī: Over the years, people have tried to develop solid-state batteries with materials such as polymers, sulfides, oxides, liquids, and composites (which are a mix of other materials, such as polymers and ceramics). The latter requires high conductivity (given the thicker cathode), high voltage stability (given the cathode voltage), and the ability to make good contact with the cathode active material particle. ![]() The former requires dendrite resistance and stability to lithium-metal. The requirements for the ceramic separator are different from that of the catholyte. The ceramic separator also enables our battery design to use a customized catholyte material, better suited for the voltage and transport requirements of the cathode. QuantumScape couples this solid-state ceramic separator with an organic gel electrolyte for the cathode (catholyte). QuantumScape has developed such a separator based on its proprietary ceramic material and uses a pure lithium-metal anode with zero excess lithium to deliver the above benefits. Once you have such a separator, you can use lithium-metal as the anode and realize the benefits of higher energy density, faster charge, and improved life and safety. ![]() Using lithium-metal as the anode requires a solid-state separator that prevents dendrites and does not react with lithium. ![]() To determine oxidation electrodes, the reduction equation can simply be flipped and its potential changed from positive to negative (and vice versa).A: Most of the benefits of solid-state stem from the ability to use lithium metal as the anode. The table below is a list of important standard electrode potentials in the reduction state. Important Standard Electrode (Reduction) Potentials We could have accomplished the same thing by taking the difference of the reduction potentials, where the absent or doubled negation accounts for the fact that the reverse of the reduction reaction is what actually occurs.
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