Recently, flexible Li-ion batteries have become important for portable electronics applications such as wearable devices or roll-up displays. These types of rechargeable batteries require fast charging rather than fast discharging, because consumers want to charge the portable electronics faster than ever. In addition, these batteries should have long guaranteed cycle lifetimes even after hundreds of repetitive bending and stretching deformations. Flexible primary batteries have been developed for similar applications, but they cannot be used in mobile electronics because they are impossible to recharge. From a practical viewpoint, flexible batteries must have 1) high electrode capacities, 2) mechanical flexibility, and 3) the cathode or anode materials should have higher capacities than the currently dominant LiCoO2, LiNi0.6Co0.2Mn0.2, and graphite. In these regards, I am going to talk about recent advances in electrode materials and flexibel batteries.

Flexible high-energy Li-ion batteries with fast-charging capability

249th National Meeting (2015)

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