ACS Nano
·
2020
·
IF 14.588
Chuang Sun,Xinlei Shi,Yabo Zhang,Jiajie Liang,Jie Qu,Chao Lai
Lithium-iodine (Li-I2) batteries are promising candidates for next-generation electrochemical energy storage systems due to their high energy density and the excellent kinetic rates of I2 cathodes. However, dissolution of iodine and iodide has hindered their widespread adoption for practical applications. Herein, a Ti3C2Tx MXene foam with a three-dimensional hierarchical porous architecture is proposed as a cathode-electrolyte interface layer in Li-I2 batteries, enabling high-rate and ultrastable cycling performance at a high iodine content and loading mass. Theoretical calculations and empirical characterizations indicate that Ti3C2Tx MXene sheets with high metallic conductivity not only provide strong chemical binding with iodine species to suppress the shuttle effect but also facilitate fast redox reactions during cell cycling. As a result, the Li-I2 battery using a cathode with 70 wt % I2 cycled stably for over 1000 cycles at a rate of 2 C, even at an ultrahigh loading mass of 5.2 mg cm–2. To the best of the authors’ knowledge, this is the highest reported loading at such a high iodine content. This work suggests that using a Ti3C2Tx MXene interface layer can enable the design and application of high-energy Li-I2 batteries.
研究领域:
材料科学
·
电化学能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Qianwu Chen,Song Chen,Jintao Zhang
Aqueous Zn-based batteries have been regarded as a promising energy storage system due to their high energy/power density, safety, and cost-effectiveness. However, their performance have been severely hindered by the dendrite growth of zinc and water-induced side reactions. Herein, a facial strategy of electrolyte modification with a high concentration of zinc sulfate and lithium iodide (LiI) as additives is proposed to guide the preferential growth along with the Zn (002) plane for the smooth Zn deposition. Compared to the pure zinc sulfate electrolyte, the Zn anode in the modified electrolyte exhibited the ultralong cycling stability for 3000 h at a capacity of 1 mAh cm −2 and 400 h at a higher capacity of 5 mAh cm −2 , with low reversible deposition potentials of around 30 and 40 mV, respectively, demonstrating the stable plating/stripping behaviors. More importantly, the cycling stability of the Zn–I 2 battery with the modified electrolyte can still deliver a large specific capacity after 5000 cycles. The strategy presented that the LiI as additive could not only provide an iodine-rich environment to induce the preferential growth of Zn (002) plane, but also eliminate the side corrosion reactions with the help of additional Li-ions, thus leading to the high-performing Zn–I 2 battery.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Cheng Zhu,Liu Hang,Zhang Menghang,Pan Hui,Sheng Chuanchao,Li Wei,Wagemaker Marnix,He Ping,Zhou Haoshen
Rechargeable Li||I 2 batteries based on liquid organic electrolytes suffer from pronounced polyiodides shuttling and safety concerns, which can be potentially tackled by the use of solid-state electrolytes. However, current all-solid-state Li||I 2 batteries only demonstrate limited capacity based on a two-electron I − /I 2 polyiodides chemistry at elevated temperatures, preventing them from rivaling state-of-the-art lithium-ion batteries. Herein, we report a fast, stable and high-capacity four-electron solid-conversion I − /I 2 /I + chemistry in all-solid-state Li||I 2 batteries at room temperature. Through the strategic use of a highly conductive, chlorine-rich solid electrolyte Li 4.2 InCl 7.2 as the catholyte, we effectively activate the I 2 /I + redox couple. This activation is achieved through a robust I-Cl interhalogen interaction between I 2 and the catholyte, facilitated by an interface-mediated heterogeneous oxidation mechanism. Moreover, apart from serving as Li-ion conduction pathway, the Li 4.2 InCl 7.2 catholyte is demonstrated to show a reversible redox behavior and contribute to the electrode capacity without compromising its conductivity. Based on the I − /I 2 /I + four-electron chemistry, the as-designed all-solid-state Li||I 2 batteries deliver a high specific capacity of 449 mAh g -1 at 44 mA g -1 based on I 2 mass and an impressive cycling stability over 600 cycles with a capacity retention of 91% at 440 mA g -1 and at 25 °C.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2025
·Vol. 63
·期 8
·1947-1957
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IF 3.6
Jiaying Tong,Dan Zhao,Jingwen Yao,Dong Chen,Junjin Duan,Yuhong Ma,Wantai Yang
First thought, we tried hexafluoroisopropanol (HFIP) as the hydrogen bonding donor and LiI as a mediator to promote the radical homopolymerization of vinyl ethers. Unexpectedly, an exothermic reaction and significant viscosity increase were observed as the monomer conversion of isobutyl vinyl ether (IBVE) up to 90% at 0°C in the absence of a radical initiator. Therefore, we speculated that it was a cationic rather than a radical polymerization and confirmed with the proton trapping agent 2,6-di-tert-butylpyridine. With anhydrous CH 2 Cl 2 as a solvent, the molecular weights of the PIBVE are in the range of 5900–8900. With a decrease in the reaction temperature to −20°C, the molecular weight distribution is in the range of 1.74–1.19. Moreover, 2-ethylhexyl vinyl ether (EHVE) and cyclohexyl vinyl ether (CHVE) could also undergo a similar polymerization. A plausible cationic polymerization mechanism is proposed that vinyl ethers are initiated by H + which is generated by the reaction of HFIP and LiI. The end groups of PIBVE are composed of -H at the α-end and an aldehyde group -CH 2 CHO (I) or an acetal group -CH 2 CH(OCH 2 CH(CH 3 ) 2 ) 2 (II) at the ω-end. In addition, the end groups for PEHVE and PCHVE are consistent with the above mechanism. Graphical
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Caiyun Wang,Huiqin Huang,Xingxing Wu,Muhammad Yousaf,Mi Yan,Yinzhu Jiang
Rechargeable magnesium batteries are considered with great potential as sustainable, economic-friendly, safe energy storage techniques. Whereas, the Mg metal anode exhibits limited plating/stripping behavior in the conventional electrolytes due to the severe passivation. Herein, a facile LiI solution treatment is reported to reconstruct the interphase between Mg metal anode and electrolytes, converting the original passivation film to I-riched solid electrolyte interphase with the ability of rapid Mg2+ migration, which can reduce the overpotential for Mg anode plating/stripping from 2 to 0.4 V at 0.1 mA cm–2. In addition, Li+ from the LiI precursor can be released and shuttles to the Mo6S8 cathode side, promoting cointercalation of Mg2+. With the simultaneous improvement of the anode and cathode, the Mg//Mo6S8 full cell delivers a decreasing voltage hysteresis (0.1 V) and much enhanced specific capacity (80.8 mAh g–1). This work provides a maneuverable anode treatment for constructing a passivation-against interphase between Mg metal anode and the conventional electrolytes, contributing an insight for the development toward high-performance Mg batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Haonan Wang,Tianyi Hou,Hang Cheng,Bowen Jiang,Henghui Xu,Yunhui Huang
The development of polymer-based solid-state batteries is severely limited by the low ionic conductivity of solid polymer electrolyte and the instable interface between polymer electrolyte and Li-metal anode. In this work, lithium iodide (LiI) as a bifunctional additive was introduced into the poly(ethylene oxide) (PEO)-based electrolyte to improve the ionic conductivity and to construct a stable interphase at the Li/PEO interface. I − anions offer a strong electrostatic interaction with hydrogen atoms on PEO chains (H PEO ) and forming massive I–H bonds that cross-link PEO chains, decrease crystallinity of PEO, and thus improve Li + interchain transport. In addition, LiI participates in the formation of an inorganic-rich interphase layer, which decreases the energy barrier of Li + transport across the interface and thus inhibits the growth of lithium dendrites. As a result, the composite PEO electrolyte with 2 wt% LiI (PEO-2LiI) presents a very high ionic conductivity of 2.1 × 10 −4 S cm −1 and a critical current density of 2.0 mA cm −2 at 45 °C. Li symmetric cell with this PEO-2LiI electrolyte exhibits a long-term cyclability over 600 h at 0.2 mA cm −2 . Furthermore, solid-state LiFePO 4 and LiNi 0.8 Mn 0.1 Co 0.1 O 2 batteries with the PEO-2LiI electrolyte show an impressive electrochemical performance with outstanding cycling stability and rate capability at 45 °C.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Dan Li,Ziye Kang,Hao Sun,Ying Wang,Haiming Xie,Jia Liu,Jiefang Zhu
Although redox mediator (RM) strategy can decrease the overpotential in Li-O 2 batteries by tuning the electrochemical formation/degradation of Li 2 O 2 from the circumscribed surface pathway to the solution one, the redox shuttling causes an unexpected RM degradation and a continuous deterioration of Li anode, finally leading to a poor cyclability. This work presents the first report detailing the development of a novel Mn x Co 3-x O 4 -decorated separator for Li-LiI-O 2 batteries. Benefiting from the promotion effect of Mn x Co 3-x O 4 nanocages on I − /I 3 − and I 3 − /I 2 redox coupling, the cell with as-prepared separator maintains a low charge potential of ~3.3 V till the death of cell cycling. In addition, as-prepared separator can efficiently restrain the redox shuttling, leading to an obvious improvement on cycling stability for the cell. Moreover, the contributions of LiI to the battery performance and the operation mechanism are systematically investigated. These results present a promising progress in the development of multi-functional separator materials for RM-involved Li-O 2 batteries and the new design of hybrid energy storage device.
研究领域:
材料科学
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电化学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Cheng Zhu,Pan Hui,Li Fan,Duan Chun,Liu Hang,Zhong Hanyun,Sheng Chuanchao,Hou Guangjin,He Ping,Zhou Haoshen
Rechargeable Li-I 2 battery has attracted considerable attentions due to its high theoretical capacity, low cost and environment-friendliness. Dissolution of polyiodides are required to facilitate the electrochemical redox reaction of the I 2 cathode, which would lead to a harmful shuttle effect. All-solid-state Li-I 2 battery totally avoids the polyiodides shuttle in a liquid system. However, the insoluble discharge product at the conventional solid interface results in a sluggish electrochemical reaction and poor rechargeability. In this work, by adopting a well-designed hybrid electrolyte composed of a dispersion layer and a blocking layer, we successfully promote a new polyiodides chemistry and localize the polyiodides dissolution within a limited space near the cathode. Owing to this confined dissolution strategy, a rechargeable and highly reversible all-solid-state Li-I 2 battery is demonstrated and shows a long-term life of over 9000 cycles at 1C with a capacity retention of 84.1%.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Small
·
2017
·Vol. 13
·期 25
·1604153
·
IF 8.643
Wangen Zhao,Dong Yang,Shengzhong Frank Liu
Organic–inorganic hybrid perovskite as a kind of promising photovoltaic material is booming due to its low-cost, high defect tolerance, and easy fabrication, which result in the huge potential in industrial production. In the pursuit of high efficiency photovoltaic devices, high-quality absorbing layer is essential. Therefore, developing organic–inorganic hybrid perovskite thin films with good coverage, improved uniformity, and crystalline in a single pass deposition is of great concern in realizing good performance of perovskite thin-film solar cell. Here, it is found that the introduction of suitable amounts of LiI plays a dramatically positive role in enlarging the grain size and reducing the grain boundaries of absorbing layer. In addition, the carrier lifetime and built-in potential of the LiI doped perovskite device are observed to increase. Thus, it leads to about 15% gain in solar cell efficiency comparing to that without the LiI doping. Meanwhile, a hysteresis reduction is observed and 18.16% power conversion efficiency is achieved in LiI doped perovskite device, as well.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Carbon Energy
·
2024
·
IF 19.5
Ying Jiang,Peng Huang,Minman Tong,Bingxin Qi,Tao Sun,Zhongyun Xian,Wen Yan,Chao Lai
Li−I 2 batteries have attracted much interest due to their high capacity, exceptional rate performance, and low cost. Even so, the problems of unstable Li anode/electrolyte interface and severe polyiodide shuttle in Li−I 2 batteries need to be tackled. Herein, the interfacial reactions on the Li anode and I 2 cathode have been effectively optimized by employing a well-designed gel polymer electrolyte strengthened by cross-linked Ti–O/Si–O (GPETS). The interpenetrating network-reinforced GPETS with high ionic conductivity (1.88 × 10 −3 S cm −1 at 25°C) and high mechanical strength endows uniform Li deposition/stripping over 1800 h (at 1.0 mA cm −2 , with a plating capacity of 3.0 mAh cm −2 ). Moreover, the GPETS abundant in surface hydroxyls is capable of capturing soluble polyiodides at the interface and accelerating their conversion kinetics, thus synergistically mitigating the shuttle effect. Benefiting from these properties, the use of GPETS results in a high capacity of 207 mAh g −1 (1 C) and an ultra-low fading rate of 0.013% per cycle over 2000 cycles (5 C). The current study provides new insights into advanced electrolytes for Li−I 2 batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 20
·期 3
·2306459
·
IF 13.3
Shuoxing Yang,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongwei Yu
Nonlinear optical (NLO) crystals are indispensable for the solid-state lasers for their ability to expand wavelength spectral to the regions where the directing lasing is difficult or even impossible, yet the rational design of a high-performance NLO crystal remains a great challenge owing to the severe structural and properties’ requirements. Herein, a new noncentrosymmetric (NCS) and polar gallium iodate, LiGa(IO 3 ) 4 , with a novel 2D anionic layer, is successfully designed and synthesized by the aliovalent substitution strategy based on classic α-LiIO 3 . The 2D [Ga(IO 3 ) 4 ] ∞ − layer in LiGa(IO 3 ) 4 is built from the GaO 6 octahedra and highly polarizable units IO 3 . Compared with its parent compound, the partial replacement of A-site Li + cation with main group Ga 3+ cation facilitates LiGa(IO 3 ) 4 to possess excellent NLO properties, including the large second-harmonic generation (SHG) response (14 × KH 2 PO 4 (KDP) @ 1064 nm), wide bandgap (4.25 eV), large birefringence (0.23 @ 1064 nm), and wide optical transparency from UV to mid-IR. These reveal that LiGa(IO 3 ) 4 will be a promising NLO crystal.
研究领域:
材料科学
·
晶体工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）