Compare Papers

Paper 1

Introduction to quantum error correction with stabilizer codes

Zachary P. Bradshaw, Jeffrey J. Dale, Ethan N. Evans

Year
2026
Journal
Annals of Physics
DOI
10.1016/j.aop.2026.170353
arXiv
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No abstract.

Open paper

Paper 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.

Open paper