Journal
APPLIED SURFACE SCIENCE
Volume 540, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2020.148351
Keywords
Li-CO2 batteries; Biomass; Electrocatalyst; Solid waste recycling
Categories
Funding
- National Natural Science Foundation of China [51608412]
- Natural Science Basic Research Plan in Shaanxi Province of China [2019JQ-428, 2020JQ-737]
- Young Talent fund of University Association for Science and Technology in Shaanxi, China [20190607]
- Special Fund Project of Education Department in Shaanxi Province of China [19JK0409]
- Chongqing Key Laboratory of Environmental Materials and Remediation Technology (Chongqing University of Arts and Sciences) [CEK1804]
- Scientific Research Fund of Shaanxi University of Science and Technology [2016BJ-48]
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By designing unique structure of NiCo-LDHs nanoflowers and combining them with microbial-derived functional carbon, this study demonstrates the feasibility of high-performance Li-CO2 battery. This work opens up a new avenue for the design of high-performance catalysts and the recycling utilization of hazardous microbial wastes.
As a promising method for CO2 capture and utilization, Li-CO2 battery is attracting significant attention due to its uniqueness in low-carbon technology and high output energy density. However, the practical application is plagued by the sluggish electrochemical reaction kinetic and difficult decomposition of Li2CO3. Herein, we propose a strategy to realize high capacity, large rate capability and good stability Li-CO2 battery by inducing the growth of Li2CO3 along the base face of hollow NiCo-LDHs nanoflowers. The unique morphology of the NiCo-LDHs nanoflowers make sure numerous exposed active sites and enough space for the reversible electrochemical reaction in Li-CO2 battery. Meanwhile, microbial-derived functional carbon (M-FC) is prepared to decorate the petals of the NiCo-LDHs nanoflowers, which can provide both superior electrical conductivity and co-catalyst effects to accelerate the kinetics of the electrochemical reaction. Due to the deliberate design and the synergy effect of the M-FC and NiCo-LDHs nanoflowers, the Li-CO2 battery using M-FC/NiCo-LDHs cathode exhibits a high discharge capacity (13756.8 mA h g(-1)), enhanced rate capability (up to 2000 mA g(-1)) and excellent cyclability (for 60 cycles) under optimized condition. This work opens a promising avenue for the design of high performance catalyst and the recycling utilization of hazardous microbial wastes.
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