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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Structural disorder determines capacitance in nanoporous carbons
AU - Liu, Xinyu
AU - Lyu, Dongxun
AU - Merlet, Céline
AU - Leesmith, Matthew J. A.
AU - Hua, Xiao
AU - Xu, Zhen
AU - Grey, Clare P.
AU - Forse, Alexander C.
PY - 2024/4/19
Y1 - 2024/4/19
N2 - The difficulty in characterizing the complex structures of nanoporous carbon electrodes has led to a lack of clear design principles with which to improve supercapacitors. Pore size has long been considered the main lever to improve capacitance. However, our evaluation of a large series of commercial nanoporous carbons finds a lack of correlation between pore size and capacitance. Instead, nuclear magnetic resonance spectroscopy measurements and simulations reveal a strong correlation between structural disorder in the electrodes and capacitance. More disordered carbons with smaller graphene-like domains show higher capacitances owing to the more efficient storage of ions in their nanopores. Our findings suggest ways to understand and exploit disorder to achieve highly energy-dense supercapacitors.
AB - The difficulty in characterizing the complex structures of nanoporous carbon electrodes has led to a lack of clear design principles with which to improve supercapacitors. Pore size has long been considered the main lever to improve capacitance. However, our evaluation of a large series of commercial nanoporous carbons finds a lack of correlation between pore size and capacitance. Instead, nuclear magnetic resonance spectroscopy measurements and simulations reveal a strong correlation between structural disorder in the electrodes and capacitance. More disordered carbons with smaller graphene-like domains show higher capacitances owing to the more efficient storage of ions in their nanopores. Our findings suggest ways to understand and exploit disorder to achieve highly energy-dense supercapacitors.
U2 - 10.1126/science.adn6242
DO - 10.1126/science.adn6242
M3 - Journal article
VL - 384
SP - 321
EP - 325
JO - Science
JF - Science
SN - 0036-8075
IS - 6693
ER -