Fig. 5 plots of specific capacity and efficiency vs. cycle number of sulfur-deficient SnS in Na half-cells at 300 mA g−1.			
cycle number	discharge capacity/mAhg-1	charge capacity/mAhg-1	efficiency/%
0	840.353	473.533	56.3493
1	532.26	502.339	94.3785
2	542.291	519.248	95.75081
3	552.683	530.975	96.07225
4	558.914	536.781	96.04
5	561.871	538.545	95.84851
6	559.358	535.075	95.65877
7	553.82	529.009	95.52002
8	546.191	521.565	95.49132
9	536.826	512.946	95.55163
10	527.535	504.856	95.70095
11	518.32	496.79	95.8462
12	510.618	490.411	96.04264
13	503.089	483.703	96.14661
14	496.612	478.37	96.32671
15	491.21	473.664	96.428
16	485.871	468.67	96.45976
17	482.388	465.827	96.56687
18	479.134	462.677	96.56526
19	476.717	460.512	96.60071
20	474.066	457.992	96.60933
21	472.133	456.011	96.58528
22	470.397	454.368	96.59245
23	468.773	452.49	96.52646
24	467.256	450.886	96.49657
25	465.366	448.602	96.39767
26	463.076	446.145	96.3438
27	461.143	444.071	96.29789
28	459.209	441.437	96.12987
29	456.94	438.973	96.06797
30	454.835	436.489	95.96645
31	452.612	434.161	95.92344
32	450.285	431.628	95.85662
33	448.379	429.606	95.81314
34	445.775	426.955	95.77814
35	443.926	425.151	95.77069
36	442.079	422.915	95.66503
37	439.907	420.925	95.685
38	437.623	418.617	95.65699
39	445.434	426.656	95.78434
40	435.5	414.311	95.13456
41	430.792	411.664	95.55981
42	429.085	409.594	95.45754
43	426.911	407.315	95.40982
44	425.418	405.672	95.35845
45	423.559	403.637	95.29652
46	421.463	401.266	95.20788
47	419.473	399.21	95.16941
48	417.115	396.701	95.10591
49	418.047	397.644	95.11945
