Real-time video deblurring still remains a challenging task due to the complexity of spatially and temporally varying blur itself and the requirement of low computational cost. To improve the network efficiency, we adopt residual dense blocks into RNN cells, so as to efficiently extract the spatial features of the current frame. Furthermore, a global spatio-temporal attention module is proposed to fuse the effective hierarchical features from past and future frames to help better deblur the current frame. Another issue needs to be addressed urgently is the lack of a real-world benchmark dataset. Thus, we contribute a novel dataset (BSD) to the community, by collecting paired blurry/sharp video clips using a co-axis beam splitter acquisition system. Experimental results show that the proposed method (ESTRNN) can achieve better deblurring performance both quantitatively and qualitatively with less computational cost against state-of-the-art video deblurring methods. In addition, cross-validation experiments between datasets illustrate the high generality of BSD over the synthetic datasets. The code and dataset are released at https://github.com/zzh-tech/ESTRNN.
Rechargeable lithium (Li) metal batteries hold great promise for revolutionizing current energy‐storage technologies. However, the uncontrollable growth of lithium dendrites impedes the service of Li anodes in high energy and safety batteries. There are numerous studies on Li anodes, yet little attention has been paid to the intrinsic electrocrystallization characteristics of Li metal and their underlying mechanisms. Herein, a guided growth of planar Li layers, instead of random Li dendrites, is achieved on self‐assembled reduced graphene oxide (rGO). In situ optical observation is performed to monitor the morphology evolution of such a planar Li layer. Moreover, the underlying mechanism during electrodeposition/stripping is revealed using ab initio molecular dynamics simulations. The combined experiment and simulation results show that when Li atoms are deposited on rGO, each layer of Li atoms grows along (110) crystallographic plane of the Li crystals because of the fine in‐plane lattice matching between Li and the rGO substrate, resulting in planar Li deposition. With this specific topographic characteristic, a highly flexible lithium–sulfur (Li–S) full cell with rGO‐guided planar Li layers as the anode exhibits stable cycling performance and high specific energy and power densities. This work enriches the fundamental understanding of Li electrocrystallization without dendrites and provides guidance for practical applications.
Lithium metal is the “holy grail” of anodes, capable of unlocking the full potential of cathodes in next‐generation batteries. However, the use of pure lithium anodes faces several challenges in terms of safety, cycle life, and rate capability. Herein, a solution‐processable conjugated microporous thermosetting polymer (CMP) is developed. The CMP can be further converted into a large‐scale membrane with nanofluidic channels (5–6 Å). These channels can serve as facile and selective Li‐ion diffusion pathways on the surfaces of lithium anodes, thereby ensuring stable lithium stripping/plating even at high areal current densities. CMP‐modified lithium anodes (CMP‐Li) exhibit cycle stability of 2550 h at an areal current density of 20 mA cm−2. Furthermore, CMP is readily amenable to solution‐processing and spray coating, rendering it highly applicable to continuous roll‐to‐roll lithium metal treatment processes. Pouch cells with CMP‐Li as the anode and LiNi0.8Co0.1Mn0.1O2 (NCM811) as the cathode exhibits a stable energy density of 400 Wh kg−1.
hinder the practical deployment of Li metal batteries. Thus far, various emerging strategies, including electrolyte optimization, [2] solid electrolyte application, [3] and artificial protective layer construction, [4] have been proposed to stabilize SEI. These strategies have achieved remarkable electrochemical performances and provided perspectives for developing long lifespan Li metal batteries. Regrettably, most of them were conducted in a coin cell setting. The resulted from different test conditions make it exceedingly difficult to compare the developed materials or concepts for practical application. [5] In real high-energy Li metal batteries, any minor defects (such as Li dendrites, interface parasitic reactions, and volume expansion) will be aggravated, leading to unstable cycle performance. In particular, when the coin cell is magnified to the pouch cell, it will be accompanied by some unpredictable problems. [6] For example, cell gassing, which is absolutely neglected in typical coin cells but turns into a new, inextricable problem in high-energy Li metal batteries. Gassing is a common phenomenon in other battery systems (such as lead-acid batteries, zinc-air batteries, and lithium titanate-based batteries) and has been studied in depth. [7] However, the gassing of Li metal batteries is often overlooked and has not attracted enough attention. It can be predicted that the gassing problem will be an inevitable topic in the future development of Li metal batteries. Generally, highly active Li metal reacts spontaneously with organic electrolyte to form an SEI layer. [8] Unfortunately, this passivated SEI film (commonly inhomogeneous, low modulus, and poor stability) hardly regulates uniform nucleation and growth of Li and suppresses interfacial parasitic reactions between Li metal and electrolyte, causing severe Li dendrites and gassing behavior, which have a considerable impact on the cycle life of high-energy Li metal batteries (Figure 1a). Hence, constructing a stable and cell-level SEI film to extend the cycle life in practical high-energy Li metal batteries is urgently needed.Here, we constructed an efficient multifunctional silanization interface (MSI) on the Li metal anode surface for highenergy Li metal pouch cells (Figure 1b). Contrasted with the original SEI film, MSI simultaneously possesses the properties of homogenizing Li-ion flux, high modulus, and high stability. The pouch cell assembled with the MSI protected Li metal anode (MSI-Li), high-area capacity LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode Lithium (Li) metal has attracted unprecedented attention as the ultimate anode material for future rechargeable batteries, but the electrochemical behavior (such as Li dendrites and gassing problems) in real Li metal pouch cells has received little attention. To achieve realistic high-energy Li metal batteries, the designed solid electrolyte interface to suppress both Li dendrites and catastrophic gassing problems is urgently needed at cell level. Here, an efficient multifunctional silanization interfac...
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