Ohmic contact interface engineering of fullerene-derived long-range ordered porous carbon-based anodes for durable sodium-ion capacitors
Jundong Shao#, Mingming Gao#, Ying Huang*, Songlin Liu, Junke Li, Xiaosong Xiong, Antonio Gaetano Ricciardulli, Sheng Yang*, Yubin Fu*, Faxing Wang, Chun Fang, Panpan Zhang*, Xing Lu*
Chemical Engineering Journal
https://doi.org/10.1016/j.cej.2025.171565
Abstract
The development of high-performance anode materials has become crucial for the advancement of sodium-ion capacitors (SICs). Long-range ordered porous carbon (LOPC), as a novel carbon material featuring three-dimensional interconnected sp2/sp3 hybridized carbon framework, is promising for high-density sodium-ion storage. Herein, we report an ohmic contact of LOPC embedded in exfoliated graphene (EG) (L-EG) with facilitated unimpeded electron flow from EG to LOPC, which ensures high electron/ion mobility through low-resistance interfacial region and high structural integrity. Pristine LOPC stores sodium ions in the Na+ intercalation/deintercalation process while suffers from severe structural collapse combined with limited ion mobility. Benefiting from the ohmic contact interface engineering, the designed L-EG electrode exhibits a high specific capacity of 120.0 mAh g−1 at 0.1 A g−1 and remarkable long cycle lifespan (113.7 % after 1000 cycles). When paired L-EG anode with activated carbon cathode, the assembled SICs deliver a maximum energy density of 82.1 Wh kg−1 and a maximum power density of 3498.0 W kg−1. These findings highlight the promising application potential of novel carbon materials in the field of sodium-ion energy storage devices.
