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Paper 1
Addendum to "Single photon logic gates using minimum resources"
Qing Lin, Bing He
- Year
- 2010
- Journal
- arXiv preprint
- DOI
- arXiv:1011.4814
- arXiv
- 1011.4814
The authors call attention to a previous work [Qing Lin and Bing He, Phys. Rev. A 80, 042310 (2009)] on the realization of multi-qubit logic gates with controlled-path and merging gate. We supplement the work by showing how to efficiently build realistic quantum circuits in this approach and giving the guiding rules for the task.
Open paperPaper 2
Overcoming the Trade-Off between Initial Coulombic Efficiency and Rate Performance in Hard Carbon Anodes for Sodium-Ion Storage.
Li Z, Gao Y, Luo W, Xu Z, Wu J, Wang Y, Zhang K, Chen R, Lu Z, Wang HL
- Year
- 2026
- Journal
- ACS nano
- DOI
- 10.1021/acsnano.5c17936
- arXiv
- -
Hard carbon (HC) has emerged as a promising anode for sodium-ion batteries owing to its low-voltage plateau and cost-effectiveness. However, HC anodes still suffer from a performance trade-off between the initial Coulombic efficiency (ICE) and rate capability. To address this issue, we propose a scalable synthesis method, the melt-spinning technique (kilogram scale) with a hexamethylenetetramine (HMTA) cross-linking-oxidation strategy, to multidimensionally regulate the structure of phenolic resin-derived hard carbon (CPF-1400) as high-performance anodes. Experimental studies demonstrate that the spatially cross-linked precursor with methylene bridge (-CH-) and rich carbonyl groups (C═O) effectively suppresses excessive graphitization (even at 1400 °C) and enlarges the spacing of carbon interlayers from 0.367 to 0.381 nm. Additionally, it enables the reduction of the specific surface area to merely 1.4 m g and generates abundant and suitable-sized closed pores (0.315 cm g, 1.26 nm) for CPF-1400. Therefore, CPF-1400 delivers an exceptional reversible sodium storage capacity of 431 mAh g with an unprecedentedly high ICE of 95%. Notably, it also retains a rate capability of 308 mAh g at 1 A g, and it achieves a high energy density of 293 Wh kg assembled in full cells. Electrochemical analyses combined with in situ characterizations demonstrate a three-stage sodium storage mechanism in hard carbon and elucidate the correlation between the solid-electrolyte interphase (SEI) and battery performance.
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