ACS ENERGY LETTERS 发表的论文报告了能源研究各个方面的新科学进展。下面列出了与能量捕获、转换和存储相关的主题。能源材料、光捕获组件能量转换过程（催化和光催化）太阳能燃料（制氢、减少二氧化碳）无机、有机和混合光伏光合作用和生物燃料燃料电池、蓄电池和超级电容器等离子、OLED 和光显示系统串联器件、压电和热电过程

ACS Energy Letters publishes papers reporting new scientific advancements in various aspects of energy research. The topics covered include energy capture, conversion, and storage, such as energy materials, light-harvesting components, energy conversion processes (catalysis and photocatalysis), solar fuels (hydrogen production, carbon dioxide reduction), inorganic, organic, and hybrid photovoltaics, photosynthesis and biofuels, fuel cells, batteries, and supercapacitors, plasma, OLEDs and optical display systems, tandem devices, piezoelectric and thermoelectric processes.

《ACS Energy Letters》发表关于能源研究各个方面的新科学进展的论文。主要涵盖以下主题：能量捕获、转换和存储，包括能源材料、光捕获组件、能量转换过程（催化和光催化）、太阳能燃料（制氢、减少二氧化碳）、无机、有机和混合光伏、光合作用和生物燃料、燃料电池、蓄电池和超级电容器、等离子体、OLED和光显示系统、串联器件、压电和热电过程等。

ACS Energy Letters

MXenes are rising star materials for electrochemical energy storage, but their low potential window severely constrains their high-energy-density potential. When subjected to a high potential window, MXenes undergo an irreversible oxidative failure. However, the mechanisms behind this failure are not well understood. Here, we disclose a previously unreported ion-accumulation mechanism that limits the high operating potential of MXenes. Under excessive polarization at high potential, the representative MXene, Ti3C2Tx, shows oxidation behavior but a reversible electrochemical response. Spectroscopic analyses and electrochemical kinetic field simulations disclose the conformational state variation, ion flux distribution, and vertical displacement behavior of MXene electrodes, confirming that electrolyte ions predominantly accumulate at the edges of overly thick stacked MXenes, with only a limited number shuttling freely into the interior. To address this potential-limiting ion-accumulation mechanism, we develop a transferring–engraving method to build free ion-shuttling ultrathin MXenes that guarantees a 100% increase in the potential window and a high volumetric energy density of 45.7 mWh cm–3.

Yanting Xie

Haitao Zhang

Yuanxiao Qu

Xinglin Jiang

Junfeng Huang

Xiong Zhang

Yuyu Gao

Liang Tang

Qiang Lv

Xingxing Jiao

Weiqing Yang

Zhengyou He

Unraveling the Ion-Accumulation-Induced Potential Limitations of MXene-Based Supercapacitors

揭示MXene基超级电容器离子积累引起的潜在限制

Drawing from both experimental data and simulation, we highlight best practices for fitting time-resolved photoluminescence (TRPL) decays of halide perovskite semiconductors, which are now widely studied for applications in photovoltaics and light-emitting diodes (LEDs). First, at low excitation intensities, high-quality perovskites often show pseudo-first-order kinetics, consistent with classic minority carrier lifetimes. Second, multiexponential decays, frequently observed at low excitation intensities, often have significant contributions from spatial heterogeneity. We recommend fitting such decays with stretched exponentials, where the stretching factor (β) can be used to characterize the heterogeneity of the local lifetime distribution. Third, PL decay kinetics can depend on the excitation wavelength. We discuss how penetration depth, carrier diffusion, and surface recombination affect measurements and make recommendations for choosing experimental parameters suited to the question at hand. Accounting for these factors will provide a more reliable and physical interpretation of carrier recombination and better understanding of nonradiative losses in perovskite semiconductors.

Margherita Taddei

Sarthak Jariwala

Robert J. E. Westbrook

Shaun Gallagher

Aaron C. Weaver

Justin Pothoof

Mark E. Ziffer

Henry J. Snaith

David S. Ginger

ACS Energy Lett.

Interpreting Halide Perovskite Semiconductor Photoluminescence Kinetics

解读卤化物钙钛矿半导体光致发光动力学

A series of single-crystal, Ni-rich Li[NixCoyMn1–x–y]O2 (NCM) cathodes (x = 0.7, 0.8, and 0.9) with particle diameters of ∼3 μm are systematically compared with polycrystalline cathodes with corresponding Ni contents. Despite their high resistance to microcracking, the electrochemical performances of single-crystal NCM cathodes, in terms of capacity and cycling stability, are inferior to those of polycrystalline NCM cathodes. In situ XRD and TEM analyses reveal that the lithium concentrations in single-crystal NCM cathodes become spatially inhomogeneous during cycling; this phenomenon is exacerbated by high C rates and Ni contents, resulting in the coexistence of phases with widely different unit cell dimensions within a single cathode particle. This coexistence of two phases induces nonuniform stress that generates structural defects, impairing the diffusion of lithium ions and, eventually, leading to rapid capacity fading.

Hoon-Hee Ryu

Been Namkoong

Jae-Hyung Kim

Ilias Belharouak

Chong S. Yoon

Yang-Kook Sun

Capacity Fading Mechanisms in Ni-Rich Single-Crystal NCM Cathodes

Halogenation and asymmetry strategy on the 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (INCN) terminal groups are effective approaches for constructing efficient nonfullerene acceptors (NFAs). In this study, we introduced iodine-based I-INCN and the chlorine-based Cl-INCN into one molecule named BOCl-I, in which I-INCN is beneficial for suppressing nonradiative recombination and Cl-INCN makes for charge generation. An impressive power conversion efficiency (PCE) of 19.60% was achieved in the PM6:BOCl-I-based device, which is one of the champion PCEs among the reported binary organic solar cells to date. Detailed analyses revealed that the PM6:BOCl-I based device strikes a balance between efficient charge generation and suppressed nonradiative recombination, leading to a low nonradiative voltage loss of 0.228 eV and higher short circuit current density of 28.7 mA·cm–2. This work demonstrates a feasible way to reduce the trade-off between charge generation and nonradiative recombination via the synergetic effect of halogenation and asymmetric strategy.

Hongchen Rong

Pengfei Ding

Shanshan Qin

Zhenyu Chen

Da Liu

Fengzhi Wang

Kangqiao Ma

Yongchao Hu

Deping Qian

Ziyi Ge

Reducing the Trade-Off between Charge Generation and Nonradiative Voltage Loss via Asymmetric Strategy Enables Binary Organic Solar Cells over 19.5%

通过非对称策略减少电荷生成与非辐射电压损失之间的权衡，使二元有机太阳能电池效率超过19.5%

With the increasing demand for large-scale energy storage, high-safety and low-cost rechargeable zinc-ion batteries (ZIBs) have been regarded as potential substitutes for lithium-ion batteries (LIBs). Exploring high-performance cathodes and a stable zinc anode is important, and fruitful achievements have been made. However, many fundamental issues still hinder the development of zinc-based energy storage systems. As a pivotal component, the electrolyte provides the basic operating environment to ensure the high compatibility and reversible cycling of each component in the battery. In this Focus Review, we present a comprehensive overview of electrolyte strategies in terms of solving or alleviating the issues of cathode dissolution, zinc dendrites and corrosion, hydrogen evolution, and so on. Furthermore, the adoption of gel electrolytes in flexible batteries is briefly introduced. Finally, the recommended future research perspectives of electrolytes are discussed, which may boost the development of this field.

Cunxin Liu

Xuesong Xie

Bingan Lu

Jiang Zhou

Shuquan Liang

Electrolyte Strategies toward Better Zinc-Ion Batteries

Andrew Dopilka

Jonathan M. Larson

Robert Kostecki

Operando Infrared Nanospectroscopy of the Silicon/Electrolyte Interface during Initial Stages of Solid-Electrolyte-Interphase Layer Formation

初始阶段固态电解质界面层形成过程中硅/电解质界面的Operando红外纳米光谱分析

The exclusive orientation of a singular perovskite facet during crystallization can lead to significant strain accumulation in solution-processed films, compromising the performance of perovskite solar cells (PSCs). To address this issue, we propose a facet-complementarity strategy through crystallization modulation utilizing a formamidine-based additive 1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboximidamide hydrochloride (FPPC) to control strain accumulation. The FPPC ligand shows strong adsorption on the (111) facet of perovskite via chemical interactions with octahedra lattice, promoting the formation of a more stable (111) facet against the preferred (100) orientation and achieving facet complementarity in the FAPbI3 film. Additionally, the increased dissociation barrier of the ligand-PbI2 bonding extends the crystallization growth window, allowing for a better lattice rearrangement and a balanced crystallization rate from bulk to surface. As a result, the facet-complementary devices achieve champion efficiencies of 25.63 and 24.26% on 0.09 and 1.0 cm2 scales, respectively, with greatly enhanced device longevity.

Tinghuan Yang

Yang Yang

Tianqi Niu

Erxin Zhao

Nan Wu

Shuang Wang

Xin Chen

Shumei Wang

Yajie Wang

Yin Wu

Zheng Zhang

Cheng Ma

Yongshuai Gong

Dongxue Liu

Kui Zhao

Facet Orientation-Dependent Strain Relaxation Stabilizes FAPbI3 Perovskite Solar Cells

晶面取向依赖的应变弛豫稳定了FAPbI3钙钛矿太阳能电池

The capture of CO2 using alkaline solutions requires significant thermal energy to release CO2 from a (bi)carbonate-enriched solution. This release of CO2 can instead be performed electrochemically with a "bicarbonate electrolyzer". The bicarbonate electrolyzer forms acid equivalents to convert a (bi)carbonate-enriched eluent from a CO2 capture unit into CO2 and, in turn, an upgraded carbon product such as CO and ethylene. There exists a tension for this closed-loop cycle to be put into practice: a smaller CO2 capture unit is required when using a more caustic CO2 capture solution, yet the electrolyzer works more effectively at a lower pH. Here, we elaborate on three different methods to align different pH regimes to couple air capture to CO2 electrolysis. We also use a mass-balance model to assess the commercial viability of a reactive carbon capture system that integrates the CO2 capture unit with a bicarbonate electrolyzer to show a levelized CO breakeven price below $1 kgCO–1. These economics, coupled with the other practical advantages of providing an electrolyzer with a liquid feedstock, present a compelling case for reactive carbon capture.

Yongwook Kim

Marzieh Namdari

Andrew M. L. Jewlal

Yifu Chen

Douglas J. D. Pimlott

Monika Stolar

Curtis P. Berlinguette

Economic Viability of Integrated CO2 Capture and Conversion

综合二氧化碳捕集与转化技术的经济可行性

Jiazhen Cai

Xin Zhang

Huiyang Gou

Gongkai Wang

Interface Engineering of Aluminum Foil Anode for Solid-State Lithium-Ion Batteries under Extreme Conditions

极端条件下固态锂离子电池铝箔阳极的界面工程

Alkaline exchange membrane fuel cells (AEMFCs) offer a promising solution for clean hydrogen utilization. However, effective water management remains a challenge due to the concurrent generation and consumption of water at the electrodes, which impacts the efficiency of AEMFCs at high current densities. Here, we report the fabrication of alkaline fuel cells with improved water management by employing a three-dimensionally patterned alkaline exchange membrane (AEM) at the interface with the cathode catalyst layer. This micropatterned AEM, made by soft lithography, enables a power density of 628 mW cm–2 at a current density of 1100 mA cm–2, representing an approximately 50% performance improvement over identical AEMFCs made from conventional two-dimensional AEMs. The patterned AEM also improves platinum utilization due to the increased catalyst-membrane contact area and tailored catalyst layer thickness.

Chang Liu

Tianyue Gao

Leanna Schulte

Sariah Marth

Heemin Park

Chulsung Bae

Thomas E. Mallouk

Enhancing Water Management with Three-Dimensionally Micropatterned Anion Exchange Membranes for Alkaline Fuel Cells

利用三维微图案阴离子交换膜增强碱性燃料电池的水管理

Abbreviation	ACS Energy Lett.
Journal Impact	19.28
Quartiles(Global)	NANOSCIENCE & NANOTECHNOLOGY(Q1)

ISSN	2380-8195
h-index	195
Top Journals	Yes

Publication Information	Publisher: American Chemical Society，Publishing cycle: ，Journal Type: journal，Open Access Journals: No
Basic data	Year of publication: 2016，Proportion of original research papers: 93.37%，Self Citation Rate:4.10%， Gold OA Rate: 11.57%

ACS Energy Letters

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