N-Heterocycles Extended π-Conjugation Enables Ultrahigh Capacity,Long-Lived,and Fast-Charging Organic Cathodes for Aqueous Zinc Batteries

The aqueous zinc-organic battery is a promising candidate for large-scale energy storage.However,the rational design of advanced organic cathodes with high capacity,long lifespan,and high rate capability remains a big challenge.Herein,we propose that extending theπ-conjugation by N-heterocycles can provide more active sites,lead to insolubility,and facilitate charge transfer,thus boosting the overall electrochemical performance of organic electrodes.Based on this concept,a novel organic compound,dipyrido[3ʹ,2ʹ:5,6;2″,3″:7,8]quinoxalino[2,3-i]dipyrido[3,2-a:2ʹ,3ʹ-c]phenazine-10,21-dione(DQDPD),has been rationally designed and evaluated as the cathode for aqueous zinc batteries.Excitingly,DQDPD shows a record high capacity(509 mAh g^(−1) at 0.1 A g^(−1),corresponding to a record-breaking energy density of 348 Wh kg^(−1)),excellent cycling stability(92%capacity retention after 7500 cycles at 10 A g^(−1)),and fast-charging capability(161 mAh g^(−1) at 20 A g^(−1)).Our work offers new ideas in the molecular engineering of organic electrodes for high-performance rechargeable batteries.

Efficient quantum arithmetic operation circuits for quantum image processing

Efficient quantum circuits for arithmetic operations are vital for quantum algorithms.A fault-tolerant circuit is required for a robust quantum computing in the presence of noise.Quantum circuits based on Clifford+T gates are easily rendered faulttolerant.Therefore,reducing the T-depth and T-Count without increasing the qubit number represents vital optimization goals for quantum circuits.In this study,we propose the fault-tolerant implementations for TR and Peres gates with optimized T-depth and T-Count.Next,we design fault-tolerant circuits for quantum arithmetic operations using the TR and Peres gates.Then,we implement cyclic and complete translations of quantum images using quantum arithmetic operations,and the scalar matrix multiplication.Comparative analysis and simulation results reveal that the proposed arithmetic and image operations are efficient.For instance,cyclic translations of a quantum image produce 50%T-depth reduction relative to the previous best-known cyclic translation.

PDMS/MWCNT-based tactile sensor array with coplanar electrodes for crosstalk suppression

The severe crosstalk effect is widely present in tactile sensor arrays with a sandwich structure.Here we present a novel design for a resistive tactile sensor array with a coplanar electrode layer and isolated sensing elements,which were made from polydimethylsiloxane(PDMS)doped with multiwalled carbon nanotubes(MWCNTs)for crosstalk suppression.To optimize its properties,both mechanical and electrical properties of PDMS/MWCNT-sensing materials with different PDMS/MWCNT ratios were investigated.The experimental results demonstrate that a 4 wt% of MWCNTs to PDMS is optimal for the sensing materials.In addition,the pressure-sensitive layer consists of three microstructured layers(two aspectant PDMS/MWCNT-based films and one top PDMS-based film)that are bonded together.Because of this three-layer microstructure design,our proposed tactile sensor array shows sensitivity up to−1.10 kPa^(−1),a response time of 29 ms and reliability in detecting tiny pressures.