TY  - JOUR
PY  - 2018//
TI  - Non-flammable electrolyte enables Li-metal batteries with aggressive cathode chemistries
JO  - Nature nanotechnology
A1  - Fan, Xiulin
A1  - Chen, Long
A1  - Borodin, Oleg
A1  - Ji, Xiao
A1  - Chen, Ji
A1  - Hou, Singyuk
A1  - Deng, Tao
A1  - Zheng, Jing
A1  - Yang, Chongyin
A1  - Liou, Sz-Chian
A1  - Amine, Khalil
A1  - Xu, Kang
A1  - Wang, Chunsheng
SP  - 715
EP  - 722
VL  - 13
IS  - 8
N2  - Rechargeable Li-metal batteries using high-voltage cathodes can deliver the highest possible energy densities among all electrochemistries. However, the notorious reactivity of metallic lithium as well as the catalytic nature of high-voltage cathode materials largely prevents their practical application. Here, we report a non-flammable fluorinated electrolyte that supports the most aggressive and high-voltage cathodes in a Li-metal battery. Our battery shows high cycling stability, as evidenced by the efficiencies for Li-metal plating/stripping (99.2%) for a 5 V cathode LiCoPO<sub>4</sub> (~99.81%) and a Ni-rich LiNi<sub>0.8</sub>Mn<sub>0.1</sub>Co<sub>0.1</sub>O<sub>2</sub> cathode (~99.93%). At a loading of 2.0 mAh cm<sup>-2</sup>, our full cells retain ~93% of their original capacities after 1,000 cycles. Surface analyses and quantum chemistry calculations show that stabilization of these aggressive chemistries at extreme potentials is due to the formation of a several-nanometre-thick fluorinated interphase.<p />  <p>Language: en</p>
LA  - en
SN  - 1748-3387
UR  - http://dx.doi.org/10.1038/s41565-018-0183-2
ID  - ref1
ER  -