ACS Applied Energy Materials
·
2018
·
IF 0
Huanhuan Guo,Guangmei Hou,Jianguang Guo,Xiaohua Ren,Xiaoxin Ma,Linna Dai,Shirui Guo,Jun Lou,Jinkui Feng,Lin Zhang,Pengchao Si,Lijie Ci
Lithium–oxygen batteries (LOBs) have attracted increasing interest because of their superior theoretical specific energy. However, the stability of lithium metal anode is one of the obstacles limiting their practical applications. Here, we introduce an artificial Li3PO4 solid electrolyte interphase (SEI) film to protect the lithium anode in LOB with LiI/LiNO3/DMSO (dimethyl sulfoxide) electrolyte. The Li3PO4-protected Li anode exhibits excellent electrochemical stability during the Li stripping/plating process and leads to a relatively uniform and featureless surface in LOB after cycling. Our research demonstrates that superior electrochemical performance can be achieved in the Li–O2 battery with the synergistic combination of the DMSO-based electrolyte, the LiI redox mediator, and the Li3PO4-protected Li anode. The LOB with a Li3PO4-protected Li anode exhibits a prolonged cycling life span of 152 cycles with a fixed capacity of 1000 mA h g–1 at 2 A g–1. The results in this work provide knowledge for the development of a robust strategy for protecting the Li anode in the applications of Li–O2 batteries.
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RSC Advances
·
2018
·Vol. 8
·期 41
·23397-23403
·
IF 2.936
Zhuo-Liang Jiang,Jing Xie,Cong-Shan Luo,Meng-Yang Gao,Huan-Liang Guo,Mo-Han Wei,Hong-Jun Zhou,Hui Sun
The mechanism of Li–O2 batteries is based on the reactions of lithium ions and oxygen, which hold a theoretical higher energy density of approximately 3500 W h kg−1. In order to improve the practical specific capacity and cycling performance of Li–O2 batteries, a catalytically active mechanically robust air cathode is required. In this work, we synthesized a freestanding catalytic cathode with RuO2 decorated 3D web Co3O4 nanowires on nickel foam. When the specific capacity was limited at 500 mA h g−1, the RuO2–Co3O4/NiF had a stable cycling life of up to 122 times. The outstanding performance can be primarily attributed to the robust freestanding Co3O4 nanowires with RuO2 loading. The unique 3D web nanowire structure provides a large surface for Li2O2 growth and RuO2 nanoparticle loading, and the RuO2 nanoparticles help to promote the round trip deposition and decomposition of Li2O2, therefore enhancing the cycling behavior. This result indicates the superiority of RuO2–Co3O4/NiF as a freestanding highly efficient catalytic cathode for Li–O2 batteries.
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PubMed
高影响因子
AICHE JOURNAL
·
2022
·Vol. 69
·期 5
·e17999
·
IF 4.167
Dong Lin,Yang Xu,Xiuhui Zheng,Wei Sheng,Zhenyi Liu,Yinglong Yan,Yu Cao,Yibin Liu,Xiang Feng,De Chen,Chaohe Yang
Regulating the microenvironment of active sites is crucial to boost the performance of direct propene epoxidation with H 2 and O 2 . Herein, the enhanced surface transfer of H 2 O 2 intermediates was first achieved by sodium-decorated Au-Ti bifunctional active sites. Combined with multi-techniques (e.g., operando UV–vis–NIR system, DFT studies and quantitative model calculations), it is found that the sodium-decorated silanols (Si-ONa species) on the TS-1 support enhance the formation of Ti-OOH intermediates by restraining H 2 O 2 decomposition. In addition, sodium-decorated silanols improves the desorption of propylene oxide, suppressing its ring-opening and formation for the carbonaceous deposits. Moreover, the sodium-decorated Au nanoparticles with smaller diameter and higher electron density further strengthen O 2 adsorption and boost the H 2 O 2 formation. This work not only provides fundamental understandings on the microenvironment of Au-Ti bifunctional catalysts but also sheds new light on enhancing the performance by boosting the surface molecular transfer.
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高影响因子
Energy Technology
·
2022
·Vol. 10
·期 12
·2200800
·
IF 4.149
Haoxiang Zhong,Qianqian Hu,Lingzhi Zhang
The shuttle effect of polysulfides severely limits the practical application of lithium–sulfur batteries. Herein, the lithium-rich Li[Li 0.2 Ni 0.2 Mn 0.6 ]O 2 /hierarchical porous graphitic carbon composite (LLNM/HPGC) is designed and synthesized as host material for lithium–sulfur batteries, aiming to restrict the shuttle effect of polysulfides via physical entrapment from 3D HPGC and accelerate the conversion of polysulfides from the lithium-rich LLNM as catalyst. Benefiting from the well-constructed host framework, 1glycerinum-LLNM/2HPGC@sulfur (1Gly-LLNM/2HPGC@S) shows higher specific capacity of 651 mAh g −1 after 200 cycles at 0.5C than that of 546.3, 422.8, 476, and 421.7 mAh g −1 for HPCG@S, Gly-LLNM@S, 1Gly-LLNM/3HPGC@S, and 1Gly-LLNM/5HPGC@S. Therefore, this work demonstrates a promising route to inhibit the shuttle effect of polysulfides for lithium–sulfur batteries.
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高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 23
·7632-7639
·
IF 6.119
Hongjiao Wang,Bo Fan,Zhongkuan Luo,Qixing Wu,Xuelong Zhou,Fang Wang
The development of high-performance cathodes is critical to promoting the development of Li–O2 batteries. In this work, three-dimensional NiCo2O4 nanowire-decorated NiO nanosheets (NiO@NiCo2O4) on a Ni foam were fabricated by a two-step solvothermal process. The product exhibited efficient catalytic performance for Li–O2 batteries. This three-dimensional NiO@NiCo2O4 hierarchical structures grown on Ni foam forms a porous catalytic surface for the uniform growth of discharge products. First, NiCo2O4 is a promising catalyst for improving the oxygen reduction reaction/oxygen evolution reaction (ORR/OER) processes for the Li–O2 batteries. Second, NiO can provide a porous scaffold for the further deposition of NiCo2O4 nanowires to avoid their aggregation. Furthermore, NiO can promote the decomposition of by-products containing carbonate/carboxylate species. As a result, the Li–O2 system with NiO@NiCo2O4 as a carbon-free cathode showed a maximum in-depth-specific discharge capacity of 9361.4 mA h g−1 at a current density of 100 mA g−1 and 176 cycles of stability under a limited capacity of 500 mA h g−1 at a current density of 200 mA g−1. The reported strategy regarding a multicomponent hierarchical structure may provide a new approach for effective electrocatalyst design for Li–O2 batteries.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Lei Shi,Gan Wang,Jian Li,Meifen Wu,Zhaoyin Wen
The practical applications of Li–O2 batteries are hindered by the large charge polarization. Recently, the development of redox mediators (RMs) brings new hope for constructing low overpotential Li–O2 batteries. However, the “shuttle effect” of RMs causes new problems. Here, based on a low-cost and environmentally friendly biomaterial–bacterial cellulose, a sulfonation strategy was adopted to produce a functional gel polymer electrolyte for LiI-involved Li–O2 batteries. Benefiting from the high-density negatively charged sulfonate groups on the sulfonated bacterial cellulose, the functionalized gel electrolyte can produce strong electrostatic repulsion force to the negatively charged I3– ions to suppress the shuttle effect. As a result, the Li–O2 battery shows a good cycling performance with eliminated self-discharge, and the Li anode is successfully protected by the inhibition of I3– shuttling. This novel approach may provide new insights into the development of functionalized gel polymer electrolytes for Li–O2 batteries with redox mediators.
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高影响因子
BIOMATERIALS
·
2021
·
IF 12.479
Hua Yu,Yue Cheng,Cong Wen,Yi-Qing Sun,Xue-Bo Yin
Nanozymes have been combined with glucose oxidase (GOx) for dual-enzyme cascade catalytic therapy. However, their catalysis efficiency is restricted because of the hypoxia tumor microenvironment (TME). Although many methods are developed for O 2 supply, the O 2 leakage and consumption of H 2 O 2 compromised their practical application. Herein, a biocompatible carbon nitride (C 3 N 4 )/nanozyme/GOx triple cascade nanocatalyst was designed with laser-activatable O 2 self-supply via water splitting to relieve tumor hypoxia and thus improve the catalysis efficiency. To this end, polydopamine (PDA) nanosphere was prepared and attached with C 3 N 4 nanosheet to improve water splitting efficiency and realize photothermal-enhanced catalysis, simultaneously. The [email protected] 3 N 4 composite was then coated with MIL-100 (Fe), where GOx was loaded, to form C 3 N 4 /MIL-100/GOx triple cascade nanocatalyst. The triple cascade catalysis was realized with laser-activatable O 2 supply from [email protected] 3 N 4 , H 2 O 2 generation with GOx, and •OH production from peroxidase-like MIL-100 (Fe) for tumor therapy. Upon 808 nm irradiation, PDA, as a photothermal agent, realized photothermal therapy and enhanced the catalytic therapy. Thus, the synergy of laser-activatable O 2 supply and photothermal enhancement in our triple cascade nanocatalyst improved the performance of catalytic therapy without drug resistance and toxicity to normal tissues.
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PubMed
高影响因子
Biomaterials Science
·
2021
·Vol. 9
·期 20
·6772-6786
·
IF 6.843
Sulan Luo,Yiting Zhao,Kewei Pan,Yixian Zhou,Guilan Quan,Xinguo Wen,Xin Pan,Chuanbin Wu
The low oxygen level in tumors significantly reduces the antitumor efficacy of photodynamic therapy (PDT). The provision of O2 and monomeric hydrophobic photosensitizers (PSs) under physiological conditions would greatly help to shrink malignant tumors. We take advantage of the high porosity and multifunctionality of metal–organic frameworks (MOFs) to fabricate a simple all-in-one nanoplatform mediated by microneedle delivery to achieve synergistic O2 evolution and chemophototherapy. An iron(III)-based MOF (MIL-100(Fe)) acted not only as a vehicle for the concurrent delivery of zinc phthalocyanine (ZnPc) and doxorubicin hydrochloride (Dox), but also to supply O2 by decomposing hydrogen peroxide (H2O2) in the tumor microenvironment via a Fenton-like reaction. In vitro and in vivo experiments indicated that the nanoplatform had excellent biocompatibility and exerted enhanced anticancer effects. The encapsulated drug was sustainably released from the nanoplatform skeleton in response to acidic tumor microenvironments. Moreover, upon 660 nm light irradiation, ZnPc effectively produced reactive oxygen species (ROS) due to the reduction of hypoxia by MIL-100(Fe). A microneedle technique was adopted to directly deliver the nanoplatform into superficial tumors rather than via systemic circulation. Hence, this study provides a new strategy for more efficient chemophototherapy of hypoxic superficial tumors.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 2
·2026-2040
·
IF 2.478
Zhang He,Qian Jianhua,Zhang Jie,Xu Jiasheng
TiO 2 @Sn(Sb)O 2 core–shell composites (TiO 2 @SnO 2 , TiO 2 @Sb 2 O 4 and TiO 2 @Sb-SnO 2 ) have been prepared through a chemical co-precipitation method with a calcination process. The mixture hydrolysates of SnCl 4 and SbCl 3 have been deposited on the surface of TiO 2 as the precursor. These hydrolysates have been converted to Sn(Sb)O 2 particles, leading to the formation of the TiO 2 @Sn(Sb)O 2 core–shell structure. Their electrochemical performances and electrocatalytic degradation efficiencies of methylene blue (MB) have been investigated. It is found that TiO 2 @Sb-SnO 2 electrode presents a larger effective electrocatalytic area and more electroactive sites, which provide more contact points between the pollutant and electrode and enhance electrocatalytic oxidation activity. The TiO 2 @Sb-SnO 2 electrode exhibits a higher degradation efficiency (97.6%) than that of TiO 2 @SnO 2 (80.1%) and TiO 2 @Sb 2 O 4 (34.9%). The TiO 2 @Sb-SnO 2 electrode provides a 91.1% degradation efficiency after five cycles test, indicating a high stability during degradation process. These results show that the as-prepared TiO 2 @Sb-SnO 2 electrode can provide a promising application to treat dye wastewater, which relies on its core–shell structure.
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高影响因子
Acta Biomaterialia
·
2021
·
IF 8.947
Chuanchuan He,Xiaojuan Zhang,Chen Chen,Xiaoguang Liu,Yan Chen,Ruicong Yan,Ting Fan,Yongkang Gai,Robert J. Lee,Xiang Ma,Jun Luo,Yao Lu,Tan Yang,Guangya Xiang
The unfavorable factors in tumor microenvironment such as hypoxia and limited H 2 O 2 levels greatly impede the anticancer efficacy of chemotherapy and chemodynamic therapy (CDT). To address these issues and achieve O 2 /H 2 O 2 -sufficient chemo/chemodynamic combination therapy, we synthesized a solid lipid monostearin coated calcium peroxide (CaO 2 ) nanocarrier for the co-delivery of a chemotherapeutic drug doxorubicin (DOX) and a biocompatible Fenton catalyst iron-oleate complex. Specifically, the solid lipid shells of nanoparticles could disintegrate in lipase-overexpressed cancer cells to release iron-oleate and expose CaO 2 cores. Afterwards, the uncovered CaO 2 responded to the acidic aqueous environment within cancer cells, leading to the release of DOX molecules and generation of H 2 O 2 . Based on Fenton reactions, Fe 3+ liberated from iron-oleate reacted with H 2 O 2 to produce O 2 for hypoxia-relieved chemotherapy, and Fe 2+ for the catalytic generation of hydroxyl radical to initiate CDT. Both treatments synergistically contribute to the enhanced antitumor outcomes.
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高影响因子
Energy Storage Materials
·
2020
·
IF 16.28
Xiaohong Zou,Kaiming Liao,Di Wang,Qian Lu,Chuan Zhou,Ping He,Ran Ran,Wei Zhou,Wanqin Jin,Zongping Shao
Although aprotic Li-air batteries offer an attractive option for achieving ultrahigh energy density of electrochemical energy storage devices, the now-established system has so far fallen short of its potential due to a daunting challenge related to its open configuration, which results in not only the rapid corrosion of Li metal anodes but also the gradual evaporation of organic liquid electrolytes. Here, we show that these issues can be well addressed by protecting the Li-air battery with a new O 2 -permeable silica-aerogel-reinforced polydimethylsiloxane external membrane (OPSP). The highly flexible OPSP basically benefiting from hydrogen-bond cross-linking can be constructed in situ on any substrate with particularly desirable properties such as being water-/electrolyte-proof, O 2 -permeable, high thermotolerance, and transparent, which allows stable cycling of coin-type and flexible Li-air batteries under harsh conditions, such as a highly volatile DMSO electrolyte (over 660 h), a humid air (O 2 ) atmosphere (over 700 h) or circumstances in air (O 2 )-saturated liquid water (over 25 h). This work could potentially open a new research direction in developing O 2 -permeable membranes through hydrogen-bond cross-linking for the unfettered design of metal-air batteries.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Runping Wu,Qing Ye,Kai Wu,Shuiyuan Cheng,Tianfang Kang,Hongxing Dai
The alkali metal (M = Na, K, Rb, and Cs)-modified C-FDU-15 (M-C-FDU-15( x ); x was the M/C-FDU-15 M ratio, and equal to 0.01–0.03) samples were prepared through an in situ process, and characterized by means of the TG, XRD, TEM, EDS, N 2 adsorption–desorption, O 2 -TPD, and CO 2 -TPD techniques. The (NO + O 2 ) adsorption mechanism was investigated using the (NO + O 2 )-TPD and DRIFTS techniques. The results show that the sequence of (NO + O 2 ) adsorption performance was Na-C-FDU-15(0.01) (104.1 mg/g) > K-C-FDU-15(0.01) (92.4 mg/g) > C-FDU-15 (76.2 mg/g) > Rb-C-FDU-15(0.01) (65.1 mg/g) > Cs-C-FDU-15(0.01) (62.3 mg/g). The alkali metal was uniformly distributed in C-FDU-15 and its doping enhanced the amount of the basic sites in the sample. Moreover, the optimal Na/C-FDU-15 M ratio was 0.02. (NO + O 2 ) were chemically adsorbed mainly in the forms of nitrite (NO 2 − ) and nitrate (NO 3 − ) on M-C-FDU-15( x ). A more amount of NO was converted to nitrate than to nitrite. There were three key factors of enhancing the (NO + O 2 ) adsorption capacity of C-FDU-15 due to alkali metal doping: the first factor was the increasing of surface area and pore volume of the sample, the second one was the enhancement in amount of the active sites in the sample, and the third one was the smaller alkali metal ionic radius in the sample.
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高影响因子
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