Abstract The practical application of room‐temperature sodium‐sulfur (RT Na–S) batteries is blocked by the notorious shuttle effect sodium polysulfides (NaPSs) and sluggish refox reaction kinetics. Single‐atom catalysts (SACs) have been widely studied for boosting energy storage performance RT Na‐S batteries. Nevertheless, catalytic centers SACs reported so far focused mainly on symmetrical metal–N 4 structures, which offer weak bonding affinity toward polar NaPSs, leading to detrimental...

The recent emergence of orthogonal time frequency space (OTFS) modulation as a novel PHY-layer mechanism is more suitable in high-mobility wireless communication scenarios than traditional division multiplexing (OFDM). Although multiple studies have analyzed OTFS performance using theoretical and ideal baseband pulseshapes, challenging open problem the development effective receivers for practical systems that must rely on non-ideal pulseshapes transmission. This work focuses design OTFS. We...

We successfully achieve high-level pyridinic-N and pyrrolic-N in nitrogen-doped carbon materials, which exhibits a high reversible capacity (441.5 mA h g⁻¹over 100 cycles at 0.1 A g⁻¹) long-term cycling stability (283.3 g⁻¹after 1000 2 g⁻¹).

For high mobility communication scenario, the recently emerged orthogonal time frequency space (OTFS) modulation introduces a new delay-Doppler domain signal space, and can provide better performance than traditional division multiplexing system. This article focuses on joint channel estimation data detection (JCEDD) for hybrid reconfigurable intelligent surface (HRIS) aided millimeter wave (mmWave) OTFS systems. Firstly, transmission structure is designed. Within pilot durations of designed...

Integrated sensing and communication (ISAC) has become an attractive technology for future wireless networks. In this paper, we propose a simultaneous transmission reflection reconfigurable intelligent surface (STAR-RIS) aided dynamic scatterers tracking scheme ISAC in high mobility millimeter wave systems, where the STAR-RIS is employed to provide service indoor user with base station (BS) simultaneously sense track interested outdoor scatterers. Specifically, resort active respectively...

Binary metal oxides with high theoretical specific capacities and power densities are promising anode materials for lithium-ion batteries but their poor cycling stability huge volume expansion limit extensive application in practical electrode materials.

We investigate a coded uplink non-orthogonal multiple access (NOMA) configuration in which groups of co-channel users are modulated accordance with orthogonal time frequency space (OTFS). take advantage OTFS characteristics to achieve NOMA spectrum sharing the delay-Doppler domain between stationary and mobile users. develop an efficient iterative turbo receiver based on principle successive interference cancellation (SIC) overcome (CCI). propose two detector algorithms: approximate message...

Herein, we demonstrate that C–S–C bonds can significantly enlarge the interlayer spacing of carbon materials and change N-doping configuration in graphene layers.

Precise control over the interlayer spacing for K+ intercalation is an effective approach to boost potassium-storage performances in carbonaceous materials. Herein, we first found that optimal around 0.38 nm N, O codoped carbon nanofibers (NOCNs), displaying a reversible capacity of 627 mAh g-1 at 0.1 A after 200 cycles, excellent rate capability (123 20 g-1), and ultrastable cycling stability (262 5 10 000 cycles). Such good have never been reported The theoretical calculations...

Abstract The design and fabrication of a flexible electric‐optical perovskite/electrolyte synaptic transistor are demonstrated for the first time, which emulates important neuromorphic functions under dual‐mode modulation. Benefiting from bipolar charge transport properties light‐harvesting perovskite high specific capacitance mechanically robust multi‐ion electrolyte, device exhibits bidirectional plasticity, better reliability, retaining >70% initial current level after 2500 flex per...

Although carbon materials have great potential for potassium ion battery (KIB) anodes due to their structural stability and abundant carbon-containing resources, the limited K+-intercalated capacity impedes extensive applications in energy storage devices. Current research studies focus on improving surface-induced capacitive behavior boost of materials. Herein, we designed edge-nitrogen (pyridinic-N pyrrolic-N) doped spheres with a hierarchically porous structure achieve high properties....

Integrated sensing and communication (ISAC) has become a promising technology for future system. In this paper, we consider millimeter wave system over high mobility scenario, propose novel simultaneous transmission reflection reconfigurable intelligent surface (STAR-RIS) aided ISAC scheme. To improve the service of in-vehicle user equipment (UE) simultaneously track sense vehicle with help nearby roadside units (RSUs), STAR-RIS is equipped on outside vehicle. Firstly, an efficient structure...

This article investigates a distant proactive eavesdropping system in cooperative cognitive radio (CR) networks. Specifically, an amplify-and-forward (AF) full-duplex (FD) secondary transmitter assists to relay the received signal from suspicious users legitimate monitor for wireless information surveillance. In return, is granted share spectrum belonging its own transmission. To improve eavesdropping, transmitted user's (SU) can also be used as jamming moderate data rate of link. We...

As a promising technique for high-mobility wireless communications, orthogonal time frequency space (OTFS) has been proven to enjoy excellent advantages with respect traditional division multiplexing (OFDM). Although multiple studies have considered index modulation (IM) based OTFS (IM-OTFS) schemes further improve system performance, challenging and open problem is the development of effective IM efficient receivers practical systems that must operate in presence channel delays Doppler...

V 2 O 3 /CNF flexible films were evaluated as anodes for SIBs, delivering a brilliant sodium storage performance (175 mA h g −1 at 10 A ; capacity retention of 98% after 2500 cycles 1 ).

This paper investigates an uplink coordinated multi-point (CoMP) coverage scenario, in which multiple mobile users are grouped for sparse code access (SCMA), and served by the remote radio head (RRH) front of them RRH behind simultaneously. We apply orthogonal time frequency space (OTFS) modulation each user to exploit degrees freedom arising from both delay Doppler domains. As signals received RRHs experience respectively positive negative shifts, our proposed OTFS-based SCMA (OBSCMA) with...

Integrated sensing and communication (ISAC) has become an attractive technology for future wireless networks. In this paper, we propose a simultaneous transmission reflection reconfigurable intelligent surface (STAR-RIS) aided dynamic scatterers tracking scheme ISAC in high mobility millimeter wave systems, where the STAR-RIS is employed to provide service indoor user with base station (BS) simultaneously sense track interested outdoor scatterers. Specifically, resort active respectively...