Details

Autor(en) / Beteiligte

• Chen, Hao
• Xu, Hanyan
• Wang, Siyao
• Huang, Tieqi
• Xi, Jiabin
• Cai, Shengying
• Guo, Fan
• Xu, Zhen
• Gao, Weiwei
• Gao, Chao

Titel

Ultrafast all-climate aluminum-graphene battery with quarter-million cycle life

Ist Teil von

• Science advances, 2017-12, Vol.3 (12), p.eaao7233-eaao7233

Ort / Verlag

United States: American Association for the Advancement of Science

Erscheinungsjahr

2017

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• Rechargeable aluminum-ion batteries are promising in high-power density but still face critical challenges of limited lifetime, rate capability, and cathodic capacity. We design a "trihigh tricontinuous" (3H3C) graphene film cathode with features of high quality, orientation, and channeling for local structures (3H) and continuous electron-conducting matrix, ion-diffusion highway, and electroactive mass for the whole electrode (3C). Such a cathode retains high specific capacity of around 120 mAh g at ultrahigh current density of 400 A g (charged in 1.1 s) with 91.7% retention after 250,000 cycles, surpassing all the previous batteries in terms of rate capability and cycle life. The assembled aluminum-graphene battery works well within a wide temperature range of -40 to 120°C with remarkable flexibility bearing 10,000 times of folding, promising for all-climate wearable energy devices. This design opens an avenue for a future super-batteries.