TY - JOUR
T1 - Ultrafast Li+ Diffusion Kinetics of 2D Oxidized Phosphorus for Quasi-Solid-State Bendable Batteries with Exceptional Energy Densities
AU - Cui, Jiang
AU - Yao, Shanshan
AU - Chong, Woon Gie
AU - Wu, Junxiong
AU - Ihsan-Ul-Haq, Muhammad
AU - Ma, Lianbo
AU - Zhao, Ming
AU - Wang, Yewu
AU - Kim, Jang Kyo
N1 - Funding Information:
This project was financially supported by the Innovation and Technology Commission (ITS/001/17) and the Research Grants Council (GRF Projects: 16212814 and 16208718) of Hong Kong SAR. The authors also appreciate the technical assistance from the Materials Characterization and Preparation Facilities (MCPF) and the Advanced Engineering Materials Facilities (AEMF) of HKUST. The high quality black P crystals were synthesized and supplied by Prof. Y. Wang’s group at Zhejiang University.
Funding Information:
This project was financially supported by the Innovation and Technology Commission (ITS/001/17) and the Research Grants Council (GRF Projects: 16212814 and 16208718) of Hong Kong SAR. The authors also appreciate the technical assistance from the Materials Characterization and Preparation Facilities (MCPF) and the Advanced Engineering Materials Facilities (AEMF) of HKUST. The high quality black P crystals were synthesized and supplied by Prof. Y. Wang's group at Zhejiang University.
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/6/11
Y1 - 2019/6/11
N2 - Phosphorus has drawn much attention for energy storage applications due to its high theoretical capacity while its surface is prone to oxidization, causing alterations of its physicochemical properties. Herein, we report a previously overlooked Li storage mechanism in the oxidized 2D black phosphorus/graphene oxide (BP/GO) heterostructure, where Li+ ions transport at an ultralow diffusion barrier of 80 meV and an ultrafast diffusion kinetics of 2.5 × 10-6 cm2 s-1 according to the ab initio molecular dynamics simulations. Furthermore, significant synergy arises when the 2D BP sheets chemically bind with GO layers, giving rise to an exceptional mechanical strength and flexibility of the BP/GO paper. The BP/GO composite anode sustains 500 stable cycles with Coulombic efficiencies as high as 99.6% in a Li ion half-cell. A quasi-solid-state, bendable Li-ion full-cell battery is assembled for the first time by using the BP/GO anode, a V2O5/CNT cathode, and a gel polymer electrolyte. It delivers simultaneously high gravimetric and volumetric energy densities of 389 Wh kg-1 and 498 Wh L-1, respectively, with a high retention rate of 92.3% even after 100 cycles of repeated folding and unfolding. The foregoing discovery makes the current flexible battery ideally suited for powering wearable electronics that require both high energy densities and mechanical robustness.
AB - Phosphorus has drawn much attention for energy storage applications due to its high theoretical capacity while its surface is prone to oxidization, causing alterations of its physicochemical properties. Herein, we report a previously overlooked Li storage mechanism in the oxidized 2D black phosphorus/graphene oxide (BP/GO) heterostructure, where Li+ ions transport at an ultralow diffusion barrier of 80 meV and an ultrafast diffusion kinetics of 2.5 × 10-6 cm2 s-1 according to the ab initio molecular dynamics simulations. Furthermore, significant synergy arises when the 2D BP sheets chemically bind with GO layers, giving rise to an exceptional mechanical strength and flexibility of the BP/GO paper. The BP/GO composite anode sustains 500 stable cycles with Coulombic efficiencies as high as 99.6% in a Li ion half-cell. A quasi-solid-state, bendable Li-ion full-cell battery is assembled for the first time by using the BP/GO anode, a V2O5/CNT cathode, and a gel polymer electrolyte. It delivers simultaneously high gravimetric and volumetric energy densities of 389 Wh kg-1 and 498 Wh L-1, respectively, with a high retention rate of 92.3% even after 100 cycles of repeated folding and unfolding. The foregoing discovery makes the current flexible battery ideally suited for powering wearable electronics that require both high energy densities and mechanical robustness.
UR - http://www.scopus.com/inward/record.url?scp=85066470401&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.9b00861
DO - 10.1021/acs.chemmater.9b00861
M3 - Article
AN - SCOPUS:85066470401
SN - 0897-4756
VL - 31
SP - 4113
EP - 4123
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 11
ER -